[Bug] If page is loading (progress bar is seen), going back should cancel loading page, not go back

[yoasif]

From https://www.reddit.com/r/firefox/comments/ivqwab/fenix_pressing_return_while_loading_should_cancel/

Steps to reproduce

1. Go to https://old.reddit.com
2. tap a link, wait for it to load
3. tap another link, wait for progress bar to appear, immediately tap back button

Expected behavior

Page loading of the link tapped in step #3 should be cancelled. Page should not change.

Actual behavior

The browser loads https://old.reddit.com (the page loaded in step 1)

This is a little finicky to reproduce, but it is reproducible for me.

Video available at: https://www.youtube.com/watch?v=n40eOhXtwms

Device information

• Android device: Pixel 2
• Fenix version: nightly

┆Issue is synchronized with this Jira Task

[stale]

See: #17373 This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.