`chrome://flash` doesn't seem to exist anymore, but similar information
appears at `chrome://version`.
Co-authored-by: Joe Duncko <JoeDuncko@users.noreply.github.com>
* docs: add references to app.whenReady() in isReady
* refactor: prefer app.whenReady()
In the docs, specs, and lib, replace instances of `app.once('ready')`
(seen occasionally) and `app.on('ready')` (extremely common) with
`app.whenReady()`.
It's better to encourage users to use whenReady():
1. it handles the edge case of registering for 'ready' after it's fired
2. it avoids the minor wart of leaving an active listener alive for
an event that wll never fire again
* Fix URLs and Paths in docs/
* Avoiding link break to /docs/development/updgrading-chrome.md
* Fix URLs and Paths in docs/ #2
* Removed double spaces in docs
