Thanks for installing Firefox for Android!
(The version change is to differentiate from Gecko Desktop versioning.)
This has one code change, which is documented here https://github.com/mozilla-mobile/android-components/releases/tag/v54.0.4 )
This build includes:
Edit Logins #10173
Swipe-delete Bookmarks #12551
"Never save" option in logins prompt #7094
Select multiple tabs in tabs tray #10163
Save Collection from tabs tray #12856
Call/Email intents #10260
Accessibility improvements #9722 #8635 #10026
Easy session navigation #11452
Force-refresh tab #2681
Bug and crash fixes