This commit works around an issue with Puppeteer tests on Firefox
where `page.url()` does not show the URL fragment, by adding a
temporary function that solves the issue.
This commit introduces the `is_firefox`
option in CommonUtils to identify if a browser
is Firefox or not.
This helps us to avoid calling some tests
that is yet not compatible with Firefox.
When we run puppeteer with Firefox,
the `--window-size` option does not work,
which makes the bottom part of
the page cut off.
This commit fixes this issue
by setting the screen default viewport
to the maximum size of the window.
Go to Recent Topics on "#", no hash and "#recent_topics".
Go to Recent Topics as the last destination for escape key.
Map `a` key to All messages and change its hash to
`#all_messages`.
Anders Kaseorg
Riken Shah
Aman Agrawal