f11 (full screen mode is not working with the most recent update 29/ december / 17
it was just working until now and this new update ruined that feature , cant do anything .. the entire screen used to go full screen and tabs would only appear only if i hover on top of the screen but now only the bottom task bar hides and nothing happens on the top ..
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uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files and C:\Program Files(x86) Then restart system. Then run Windows Disk Cleanup. (Note: This should be Pinned and run Weekly, If never done below expect 10's of gig's) Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. But you should make a back up before you do :
- https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
- https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer
Reinstall with Current Release Firefox 57.0.3 with a Full Version Installer
Please let us know if this solved your issue or if need further assistance.
Check that the toolbars are set to auto-hide.
- right-click empty space on a toolbar or Tab bar and check on "Hide Toolbars"