diff --git a/script/lib/check-chromedriver-version.js b/script/lib/check-chromedriver-version.js
index d91b5a094..b7cad2e18 100644
--- a/script/lib/check-chromedriver-version.js
+++ b/script/lib/check-chromedriver-version.js
@@ -1,13 +1,17 @@
 'use strict';
 
 const buildMetadata = require('../package.json');
-const CONFIG = require('../config');
 const semver = require('semver');
+const chromedriverMetadataPath = require('electron-chromedriver/package.json');
+const mksnapshotMetadataPath = require('electron-mksnapshot/package.json');
 
 module.exports = function() {
-  // Chromedriver should be specified as ^n.x where n matches the Electron major version
+  // Chromedriver should be at least v9.0.0
+  // Mksnapshot should be at least v9.0.2
   const chromedriverVer = buildMetadata.dependencies['electron-chromedriver'];
   const mksnapshotVer = buildMetadata.dependencies['electron-mksnapshot'];
+  const chromedriverActualVer = chromedriverMetadataPath.version;
+  const mksnapshotActualVer = mksnapshotMetadataPath.version;
 
   // Always use caret on electron-chromedriver so that it can pick up the best minor/patch versions
   if (!chromedriverVer.startsWith('^')) {
@@ -22,24 +26,15 @@ module.exports = function() {
     );
   }
 
-  const electronVer = CONFIG.appMetadata.electronVersion;
-  if (!semver.satisfies(electronVer, chromedriverVer)) {
+  if (!semver.satisfies(chromedriverActualVer, '>=9.0.0')) {
     throw new Error(
-      `electron-chromedriver ${chromedriverVer} incompatible with electron ${electronVer}.\n` +
-        'Did you upgrade electron in package.json and forget to upgrade electron-chromedriver in ' +
-        `script/package.json to '~${semver.major(electronVer)}.${semver.minor(
-          electronVer
-        )}' ?`
+      `electron-chromedriver should be at least v9.0.0 to support the ELECTRON_CUSTOM_VERSION environment variable.`
     );
   }
 
-  if (!semver.satisfies(electronVer, mksnapshotVer)) {
+  if (!semver.satisfies(mksnapshotActualVer, '>=9.0.2')) {
     throw new Error(
-      `electron-mksnapshot ${mksnapshotVer} incompatible with electron ${electronVer}.\n` +
-        'Did you upgrade electron in package.json and forget to upgrade electron-mksnapshot in ' +
-        `script/package.json to '~${semver.major(electronVer)}.${semver.minor(
-          electronVer
-        )}' ?`
+      `electron-mksnapshot should be at least v9.0.2 to support the ELECTRON_CUSTOM_VERSION environment variable.`
     );
   }
 };
diff --git a/script/lib/install-script-dependencies.js b/script/lib/install-script-dependencies.js
index 75406b612..6c69c360f 100644
--- a/script/lib/install-script-dependencies.js
+++ b/script/lib/install-script-dependencies.js
@@ -4,6 +4,8 @@ const childProcess = require('child_process');
 
 const CONFIG = require('../config');
 
+process.env.ELECTRON_CUSTOM_VERSION = CONFIG.appMetadata.electronVersion;
+
 module.exports = function(ci) {
   console.log('Installing script dependencies');
   childProcess.execFileSync(
diff --git a/script/package-lock.json b/script/package-lock.json
index ff43cae33..77bfc0248 100644
--- a/script/package-lock.json
+++ b/script/package-lock.json
@@ -260,6 +260,68 @@
         }
       }
     },
+    "@electron/get": {
+      "version": "1.12.2",
+      "resolved": "https://registry.npmjs.org/@electron/get/-/get-1.12.2.tgz",
+      "integrity": "sha512-vAuHUbfvBQpYTJ5wB7uVIDq5c/Ry0fiTBMs7lnEYAo/qXXppIVcWdfBr57u6eRnKdVso7KSiH6p/LbQAG6Izrg==",
+      "requires": {
+        "debug": "^4.1.1",
+        "env-paths": "^2.2.0",
+        "fs-extra": "^8.1.0",
+        "global-agent": "^2.0.2",
+        "global-tunnel-ng": "^2.7.1",
+        "got": "^9.6.0",
+        "progress": "^2.0.3",
+        "sanitize-filename": "^1.6.2",
+        "sumchecker": "^3.0.1"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "fs-extra": {
+          "version": "8.1.0",
+          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.1.0.tgz",
+          "integrity": "sha512-yhlQgA6mnOJUKOsRUFsgJdQCvkKhcz8tlZG5HBQfReYZy46OwLcY+Zia0mtdHsOo9y/hP+CxMN0TU9QxoOtG4g==",
+          "requires": {
+            "graceful-fs": "^4.2.0",
+            "jsonfile": "^4.0.0",
+            "universalify": "^0.1.0"
+          }
+        },
+        "graceful-fs": {
+          "version": "4.2.4",
+          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
+          "integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw=="
+        },
+        "jsonfile": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
+          "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
+          "requires": {
+            "graceful-fs": "^4.1.6"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
+        },
+        "sanitize-filename": {
+          "version": "1.6.3",
+          "resolved": "https://registry.npmjs.org/sanitize-filename/-/sanitize-filename-1.6.3.tgz",
+          "integrity": "sha512-y/52Mcy7aw3gRm7IrcGDFx/bCk4AhRh2eI9luHOQM86nZsqwiRkkq2GekHXBBD+SmPidc8i2PqtYZl+pWJ8Oeg==",
+          "requires": {
+            "truncate-utf8-bytes": "^1.0.0"
+          }
+        }
+      }
+    },
     "@mrmlnc/readdir-enhanced": {
       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/@mrmlnc/readdir-enhanced/-/readdir-enhanced-2.2.1.tgz",
@@ -274,11 +336,33 @@
       "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-1.1.0.tgz",
       "integrity": "sha512-LAQ1d4OPfSJ/BMbI2DuizmYrrkD9JMaTdi2hQTlI53lQ4kRQPyZQRS4CYQ7O66bnBBnP/oYdRxbk++X0xuFU6A=="
     },
+    "@sindresorhus/is": {
+      "version": "0.14.0",
+      "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.14.0.tgz",
+      "integrity": "sha512-9NET910DNaIPngYnLLPeg+Ogzqsi9uM4mSboU5y6p8S5DzMTVEsJZrawi+BoDNUVBa2DhJqQYUFvMDfgU062LQ=="
+    },
+    "@szmarczak/http-timer": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-1.1.2.tgz",
+      "integrity": "sha512-XIB2XbzHTN6ieIjfIMV9hlVcfPU26s2vafYWQcZHWXHOxiaRZYEDKEwdl129Zyg50+foYV2jCgtrqSA6qNuNSA==",
+      "requires": {
+        "defer-to-connect": "^1.0.1"
+      }
+    },
     "@types/node": {
       "version": "11.9.4",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-11.9.4.tgz",
       "integrity": "sha512-Zl8dGvAcEmadgs1tmSPcvwzO1YRsz38bVJQvH1RvRqSR9/5n61Q1ktcDL0ht3FXWR+ZpVmXVwN1LuH4Ax23NsA=="
     },
+    "@types/yauzl": {
+      "version": "2.9.1",
+      "resolved": "https://registry.npmjs.org/@types/yauzl/-/yauzl-2.9.1.tgz",
+      "integrity": "sha512-A1b8SU4D10uoPjwb0lnHmmu8wZhR9d+9o2PKBQT2jU5YPTKsxac6M2qGAdY7VcL+dHHhARVUDmeg0rOrcd9EjA==",
+      "optional": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@wdio/config": {
       "version": "5.9.1",
       "resolved": "https://registry.npmjs.org/@wdio/config/-/config-5.9.1.tgz",
@@ -1035,6 +1119,12 @@
       "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
       "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24="
     },
+    "boolean": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/boolean/-/boolean-3.0.1.tgz",
+      "integrity": "sha512-HRZPIjPcbwAVQvOTxR4YE3o8Xs98NqbbL1iEZDCz7CL8ql0Lt5iOyJFxfnAB0oFs8Oh02F/lLlg30Mexv46LjA==",
+      "optional": true
+    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -1082,6 +1172,11 @@
       "resolved": "https://registry.npmjs.org/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz",
       "integrity": "sha512-TEM2iMIEQdJ2yjPJoSIsldnleVaAk1oW3DBVUykyOLsEsFmEc9kn+SFFPz+gl54KQNxlDnAwCXosOS9Okx2xAg=="
     },
+    "buffer-crc32": {
+      "version": "0.2.13",
+      "resolved": "https://registry.npmjs.org/buffer-crc32/-/buffer-crc32-0.2.13.tgz",
+      "integrity": "sha1-DTM+PwDqxQqhRUq9MO+MKl2ackI="
+    },
     "buffer-fill": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/buffer-fill/-/buffer-fill-1.0.0.tgz",
@@ -1130,6 +1225,35 @@
         }
       }
     },
+    "cacheable-request": {
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/cacheable-request/-/cacheable-request-6.1.0.tgz",
+      "integrity": "sha512-Oj3cAGPCqOZX7Rz64Uny2GYAZNliQSqfbePrgAQ1wKAihYmCUnraBtJtKcGR4xz7wF+LoJC+ssFZvv5BgF9Igg==",
+      "requires": {
+        "clone-response": "^1.0.2",
+        "get-stream": "^5.1.0",
+        "http-cache-semantics": "^4.0.0",
+        "keyv": "^3.0.0",
+        "lowercase-keys": "^2.0.0",
+        "normalize-url": "^4.1.0",
+        "responselike": "^1.0.2"
+      },
+      "dependencies": {
+        "get-stream": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-5.1.0.tgz",
+          "integrity": "sha512-EXr1FOzrzTfGeL0gQdeFEvOMm2mzMOglyiOXSTpPC+iAjAKftbr3jpCMWynogwYnM+eSj9sHGc6wjIcDvYiygw==",
+          "requires": {
+            "pump": "^3.0.0"
+          }
+        },
+        "lowercase-keys": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/lowercase-keys/-/lowercase-keys-2.0.0.tgz",
+          "integrity": "sha512-tqNXrS78oMOE73NMxK4EMLQsQowWf8jKooH9g7xPavRT706R6bkQJ6DY2Te7QukaZsulxa30wQ7bk0pm4XiHmA=="
+        }
+      }
+    },
     "call-me-maybe": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/call-me-maybe/-/call-me-maybe-1.0.1.tgz",
@@ -1316,6 +1440,21 @@
         "is-supported-regexp-flag": "^1.0.0"
       }
     },
+    "clone-response": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/clone-response/-/clone-response-1.0.2.tgz",
+      "integrity": "sha1-0dyXOSAxTfZ/vrlCI7TuNQI56Ws=",
+      "requires": {
+        "mimic-response": "^1.0.0"
+      },
+      "dependencies": {
+        "mimic-response": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-1.0.1.tgz",
+          "integrity": "sha512-j5EctnkH7amfV/q5Hgmoal1g2QHFJRraOtmx0JpIqkxhBhI/lJSl1nMpQ45hVarwNETOoWEimndZ4QK0RHxuxQ=="
+        }
+      }
+    },
     "co": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
@@ -1503,6 +1642,16 @@
         }
       }
     },
+    "config-chain": {
+      "version": "1.1.12",
+      "resolved": "https://registry.npmjs.org/config-chain/-/config-chain-1.1.12.tgz",
+      "integrity": "sha512-a1eOIcu8+7lUInge4Rpf/n4Krkf3Dd9lqhljRzII1/Zno/kRtUWnznPO3jOKBmTEktkt3fkxisUcivoj0ebzoA==",
+      "optional": true,
+      "requires": {
+        "ini": "^1.3.4",
+        "proto-list": "~1.2.1"
+      }
+    },
     "console-control-strings": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
@@ -1724,6 +1873,11 @@
       "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-2.2.1.tgz",
       "integrity": "sha512-R9hc1Xa/NOBi9WRVUWg19rl1UB7Tt4kuPd+thNJgFZoxXsTz7ncaPaeIm+40oSGuP33DfMb4sZt1QIGiJzC4EA=="
     },
+    "defer-to-connect": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/defer-to-connect/-/defer-to-connect-1.1.3.tgz",
+      "integrity": "sha512-0ISdNousHvZT2EiFlZeZAHBUvSxmKswVCEf8hW7KWgG4a8MVEu/3Vb6uWYozkjylyCxe0JBIiRB1jV45S70WVQ=="
+    },
     "deferred-leveldown": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/deferred-leveldown/-/deferred-leveldown-4.0.2.tgz",
@@ -1871,6 +2025,12 @@
       "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-1.0.3.tgz",
       "integrity": "sha1-+hN8S9aY7fVc1c0CrFWfkaTEups="
     },
+    "detect-node": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/detect-node/-/detect-node-2.0.4.tgz",
+      "integrity": "sha512-ZIzRpLJrOj7jjP2miAtgqIfmzbxa4ZOr5jJc601zklsfEx9oTzmmj2nVpIPRpNlRTIh8lc1kyViIY7BWSGNmKw==",
+      "optional": true
+    },
     "detective": {
       "version": "4.7.1",
       "resolved": "https://registry.npmjs.org/detective/-/detective-4.7.1.tgz",
@@ -1993,6 +2153,11 @@
         "is-obj": "^1.0.0"
       }
     },
+    "duplexer3": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/duplexer3/-/duplexer3-0.1.4.tgz",
+      "integrity": "sha1-7gHdHKwO08vH/b6jfcCo8c4ALOI="
+    },
     "ecc-jsbn": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz",
@@ -2003,71 +2168,12 @@
       }
     },
     "electron-chromedriver": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/electron-chromedriver/-/electron-chromedriver-5.0.1.tgz",
-      "integrity": "sha512-w82q6KkIsKjzhcucllpxeulIxYn5rccNw43rpbMuZcgMQ0EPsckoYwUt7Gadmdi14xniZ+debN9SM8V1EUyaBQ==",
+      "version": "9.0.0",
+      "resolved": "https://registry.npmjs.org/electron-chromedriver/-/electron-chromedriver-9.0.0.tgz",
+      "integrity": "sha512-+MuukzicyfduXO/4yQv9ygLKaScttJNbWtg77A9fs2YhbkISjObWaCF3eJNZL+edZXRfaF/6D4XuXvklQCmwQg==",
       "requires": {
-        "electron-download": "^4.1.1",
-        "extract-zip": "^1.6.7"
-      }
-    },
-    "electron-download": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/electron-download/-/electron-download-4.1.1.tgz",
-      "integrity": "sha512-FjEWG9Jb/ppK/2zToP+U5dds114fM1ZOJqMAR4aXXL5CvyPE9fiqBK/9YcwC9poIFQTEJk/EM/zyRwziziRZrg==",
-      "requires": {
-        "debug": "^3.0.0",
-        "env-paths": "^1.0.0",
-        "fs-extra": "^4.0.1",
-        "minimist": "^1.2.0",
-        "nugget": "^2.0.1",
-        "path-exists": "^3.0.0",
-        "rc": "^1.2.1",
-        "semver": "^5.4.1",
-        "sumchecker": "^2.0.2"
-      },
-      "dependencies": {
-        "debug": {
-          "version": "3.2.6",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
-          "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
-          "requires": {
-            "ms": "^2.1.1"
-          }
-        },
-        "fs-extra": {
-          "version": "4.0.3",
-          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-4.0.3.tgz",
-          "integrity": "sha512-q6rbdDd1o2mAnQreO7YADIxf/Whx4AHBiRf6d+/cVT8h44ss+lHgxf1FemcqDnQt9X3ct4McHr+JMGlYSsK7Cg==",
-          "requires": {
-            "graceful-fs": "^4.1.2",
-            "jsonfile": "^4.0.0",
-            "universalify": "^0.1.0"
-          }
-        },
-        "jsonfile": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
-          "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
-          "requires": {
-            "graceful-fs": "^4.1.6"
-          }
-        },
-        "ms": {
-          "version": "2.1.2",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
-          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
-        },
-        "path-exists": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
-          "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU="
-        },
-        "semver": {
-          "version": "5.7.1",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
-          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ=="
-        }
+        "@electron/get": "^1.12.2",
+        "extract-zip": "^2.0.0"
       }
     },
     "electron-link": {
@@ -2122,12 +2228,12 @@
       }
     },
     "electron-mksnapshot": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/electron-mksnapshot/-/electron-mksnapshot-5.0.0.tgz",
-      "integrity": "sha512-hmpBodQ9N6vgQI0Nhr8YuTIovZG9+bgbqVLYKS0LzuW1QtwSego9/+rP0afWvxcH/SnwTF3TbsQF6ecscZYK3w==",
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/electron-mksnapshot/-/electron-mksnapshot-9.0.2.tgz",
+      "integrity": "sha512-885PfbJuNlvfmOPNoOj8SG1/i2WlqdcogN86o2/uPGOvPWTTRyYNfutzbWUjRDUB+Wl7TC9rT8f40tNp+N/xDw==",
       "requires": {
-        "electron-download": "^4.1.0",
-        "extract-zip": "^1.6.5",
+        "@electron/get": "^1.12.2",
+        "extract-zip": "^2.0.0",
         "fs-extra": "^7.0.1",
         "temp": "^0.8.3"
       },
@@ -2283,6 +2389,58 @@
             }
           }
         },
+        "env-paths": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/env-paths/-/env-paths-1.0.0.tgz",
+          "integrity": "sha1-QWgTO0K7BcOKNbGuQ5fIKYqzaeA="
+        },
+        "extract-zip": {
+          "version": "1.7.0",
+          "resolved": "https://registry.npmjs.org/extract-zip/-/extract-zip-1.7.0.tgz",
+          "integrity": "sha512-xoh5G1W/PB0/27lXgMQyIhP5DSY/LhoCsOyZgb+6iMmRtCwVBo55uKaMoEYrDCKQhWvqEip5ZPKAc6eFNyf/MA==",
+          "requires": {
+            "concat-stream": "^1.6.2",
+            "debug": "^2.6.9",
+            "mkdirp": "^0.5.4",
+            "yauzl": "^2.10.0"
+          },
+          "dependencies": {
+            "debug": {
+              "version": "2.6.9",
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     "npm-run-path": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/npm-run-path/-/npm-run-path-1.0.0.tgz",
@@ -8642,6 +9039,11 @@
         "object-assign": "^4.1.0"
       }
     },
+    "p-cancelable": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/p-cancelable/-/p-cancelable-1.1.0.tgz",
+      "integrity": "sha512-s73XxOZ4zpt1edZYZzvhqFa6uvQc1vwUa0K0BdtIZgQMAJj9IbebH+JkgKZc9h+B05PKHLOTl4ajG1BmNrVZlw=="
+    },
     "p-limit": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-1.3.0.tgz",
@@ -9119,6 +9521,11 @@
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz",
       "integrity": "sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ="
     },
+    "prepend-http": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/prepend-http/-/prepend-http-2.0.0.tgz",
+      "integrity": "sha1-6SQ0v6XqjBn0HN/UAddBo8gZ2Jc="
+    },
     "preserve": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/preserve/-/preserve-0.2.0.tgz",
@@ -9178,6 +9585,12 @@
         "asap": "~2.0.3"
       }
     },
+    "proto-list": {
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/proto-list/-/proto-list-1.2.4.tgz",
+      "integrity": "sha1-IS1b/hMYMGpCD2QCuOJv85ZHqEk=",
+      "optional": true
+    },
     "prr": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/prr/-/prr-1.0.1.tgz",
@@ -9646,6 +10059,14 @@
       "resolved": "https://registry.npmjs.org/resolve-url/-/resolve-url-0.2.1.tgz",
       "integrity": "sha1-LGN/53yJOv0qZj/iGqkIAGjiBSo="
     },
+    "responselike": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/responselike/-/responselike-1.0.2.tgz",
+      "integrity": "sha1-kYcg7ztjHFZCvgaPFa3lpG9Loec=",
+      "requires": {
+        "lowercase-keys": "^1.0.0"
+      }
+    },
     "resq": {
       "version": "1.5.0",
       "resolved": "https://registry.npmjs.org/resq/-/resq-1.5.0.tgz",
@@ -9719,6 +10140,28 @@
         }
       }
     },
+    "roarr": {
+      "version": "2.15.3",
+      "resolved": "https://registry.npmjs.org/roarr/-/roarr-2.15.3.tgz",
+      "integrity": "sha512-AEjYvmAhlyxOeB9OqPUzQCo3kuAkNfuDk/HqWbZdFsqDFpapkTjiw+p4svNEoRLvuqNTxqfL+s+gtD4eDgZ+CA==",
+      "optional": true,
+      "requires": {
+        "boolean": "^3.0.0",
+        "detect-node": "^2.0.4",
+        "globalthis": "^1.0.1",
+        "json-stringify-safe": "^5.0.1",
+        "semver-compare": "^1.0.0",
+        "sprintf-js": "^1.1.2"
+      },
+      "dependencies": {
+        "sprintf-js": {
+          "version": "1.1.2",
+          "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.1.2.tgz",
+          "integrity": "sha512-VE0SOVEHCk7Qc8ulkWw3ntAzXuqf7S2lvwQaDLRnUeIEaKNQJzV6BwmLKhOqT61aGhfUMrXeaBk+oDGCzvhcug==",
+          "optional": true
+        }
+      }
+    },
     "run-async": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/run-async/-/run-async-2.3.0.tgz",
@@ -9786,6 +10229,12 @@
       "resolved": "https://registry.npmjs.org/semver/-/semver-5.3.0.tgz",
       "integrity": "sha1-myzl094C0XxgEq0yaqa00M9U+U8="
     },
+    "semver-compare": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/semver-compare/-/semver-compare-1.0.0.tgz",
+      "integrity": "sha1-De4hahyUGrN+nvsXiPavxf9VN/w=",
+      "optional": true
+    },
     "serialize-error": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/serialize-error/-/serialize-error-3.0.0.tgz",
@@ -10568,11 +11017,26 @@
       }
     },
     "sumchecker": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/sumchecker/-/sumchecker-2.0.2.tgz",
-      "integrity": "sha1-D0LBDl0F2l1C7qPlbDOZo31sWz4=",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/sumchecker/-/sumchecker-3.0.1.tgz",
+      "integrity": "sha512-MvjXzkz/BOfyVDkG0oFOtBxHX2u3gKbMHIF/dXblZsgD3BWOFLmHovIpZY7BykJdAjcqRCBi1WYBNdEC9yI7vg==",
       "requires": {
-        "debug": "^2.2.0"
+        "debug": "^4.1.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
+        }
       }
     },
     "supports-color": {
@@ -10884,6 +11348,11 @@
         "kind-of": "^3.0.2"
       }
     },
+    "to-readable-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/to-readable-stream/-/to-readable-stream-1.0.0.tgz",
+      "integrity": "sha512-Iq25XBt6zD5npPhlLVXGFN3/gyR2/qODcKNNyTMd4vbm39HUaOiAM4PMq0eMVC/Tkxz+Zjdsc55g9yyz+Yq00Q=="
+    },
     "to-regex": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/to-regex/-/to-regex-3.0.2.tgz",
@@ -11000,6 +11469,12 @@
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
       "integrity": "sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ=="
     },
+    "tunnel": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/tunnel/-/tunnel-0.0.6.tgz",
+      "integrity": "sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg==",
+      "optional": true
+    },
     "tunnel-agent": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -11022,6 +11497,12 @@
         "prelude-ls": "~1.1.2"
       }
     },
+    "type-fest": {
+      "version": "0.13.1",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.13.1.tgz",
+      "integrity": "sha512-34R7HTnG0XIJcBSn5XhDd7nNFPRcXYRZrBB2O2jdKqYODldSzBAqzsWoZYYvduky73toYS/ESqxPvkDf/F0XMg==",
+      "optional": true
+    },
     "typedarray": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
@@ -11230,6 +11711,14 @@
       "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
       "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI="
     },
+    "url-parse-lax": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/url-parse-lax/-/url-parse-lax-3.0.0.tgz",
+      "integrity": "sha1-FrXK/Afb42dsGxmZF3gj1lA6yww=",
+      "requires": {
+        "prepend-http": "^2.0.0"
+      }
+    },
     "use": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/use/-/use-3.1.1.tgz",
@@ -11497,14 +11986,6 @@
           "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0="
         }
       }
-    },
-    "yauzl": {
-      "version": "2.4.1",
-      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.4.1.tgz",
-      "integrity": "sha1-lSj0QtqxsihOWLQ3m7GU4i4MQAU=",
-      "requires": {
-        "fd-slicer": "~1.0.1"
-      }
     }
   }
 }
diff --git a/script/package.json b/script/package.json
index 755791276..9c0b36bca 100644
--- a/script/package.json
+++ b/script/package.json
@@ -10,9 +10,9 @@
     "coffeelint": "1.15.7",
     "colors": "1.1.2",
     "donna": "1.0.16",
-    "electron-chromedriver": "^5.0.0",
+    "electron-chromedriver": "^9.0.0",
     "electron-link": "0.4.1",
-    "electron-mksnapshot": "^5.0.0",
+    "electron-mksnapshot": "^9.0.2",
     "electron-packager": "12.2.0",
     "@atom/electron-winstaller": "0.0.1",
     "eslint": "^5.16.0",
@@ -48,5 +48,8 @@
     "terser": "^3.8.1",
     "webdriverio": "^5.9.2",
     "yargs": "4.8.1"
+  },
+  "scripts": {
+    "postinstall": "node ./redownload-electron-bins.js"
   }
 }
diff --git a/script/redownload-electron-bins.js b/script/redownload-electron-bins.js
new file mode 100644
index 000000000..405486ab8
--- /dev/null
+++ b/script/redownload-electron-bins.js
@@ -0,0 +1,50 @@
+const { spawn } = require('child_process');
+
+const electronVersion = require('./config').appMetadata.electronVersion;
+
+if (process.env.ELECTRON_CUSTOM_VERSION !== electronVersion) {
+  const electronEnv = process.env.ELECTRON_CUSTOM_VERSION;
+  console.info(
+    `env var ELECTRON_CUSTOM_VERSION is not set,\n` +
+      `or doesn't match electronVersion in ../package.json.\n` +
+      `(is: "${electronEnv}", wanted: "${electronVersion}").\n` +
+      `Setting, and re-downloading chromedriver and mksnapshot.\n`
+  );
+
+  process.env.ELECTRON_CUSTOM_VERSION = electronVersion;
+  const downloadChromedriverPath = require.resolve(
+    'electron-chromedriver/download-chromedriver.js'
+  );
+  const downloadMksnapshotPath = require.resolve(
+    'electron-mksnapshot/download-mksnapshot.js'
+  );
+  const downloadChromedriver = spawn('node', [downloadChromedriverPath]);
+  const downloadMksnapshot = spawn('node', [downloadMksnapshotPath]);
+  var exitStatus;
+
+  downloadChromedriver.on('close', code => {
+    if (code === 0) {
+      exitStatus = 'success';
+    } else {
+      exitStatus = 'error';
+    }
+
+    console.info(
+      `info: Done re-downloading chromedriver. Status: ${exitStatus}`
+    );
+  });
+
+  downloadMksnapshot.on('close', code => {
+    if (code === 0) {
+      exitStatus = 'success';
+    } else {
+      exitStatus = 'error';
+    }
+
+    console.info(`info: Done re-downloading mksnapshot. Status: ${exitStatus}`);
+  });
+} else {
+  console.info(
+    'info: env var "ELECTRON_CUSTOM_VERSION" is already set correctly.\n(No need to re-download chromedriver or mksnapshot). Skipping.\n'
+  );
+}