Problem with Firefox

Support Software & Applications
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I have exactly the same problem. It worked before and some months ago it stopped working and since then I’m no longer able to move bookmarks around. The blue marker does not appear.

The problem seems to be caused by Wayland, maybe the combination of KDE + Nvidia + Wayland. When I log in with an X11 session then bookmarks in Firefox can be moved.

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This may be helpful as a work around - to start over and not loose possibly important data.

Use your current firefox to export whatever things you need to preserve:
bookmarks, history, passwords … there are export settings and dialogues for each one - to export it to files, which can later be re-imported to restore this data

Or use firefox-sync.

Then you can painlessly remove a profile and easily start with a new one.
A few clicks and everything is back to what it was before - with a clean new profile.

I have done this much more than once - was going back and forth between firefox and firefox-esr
and the same with thunderbird and thunderbird-esr
due to a change of distributions.

For thunderbird to go back to an older version from a newer one
have the complete old profile
start the program from terminal with the --allow-downgrade switch:
thunderbird --allow-downgrade
and the profile will be imported without loss or fuzz
(there is no GUI equivalent for that - but this just needs to be done ONCE, namely the absolute first time you start the program …)

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4

Starting with Firefox 144 a profile manager can be enabled. Type about:config in address bar, search “browser.profiles.enabled” and turn to true. The profile manager will apear as the first option in the three lines menu. Create a new profile and test if FF works fine. If so copy your former settings, you only need a few files described here:

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I have to use FF in x11 mode also. In x11 it works great. In wayland it is jerky, does high speed flashing, stops completely, etc, etc. At least it works now.

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ArchWiki - Firefox -Troubleshooting

Troubleshoot Mode

The command line switch -safe-mode starts Firefox in Troubleshoot Mode, which disables extensions, themes, hardware acceleration, the JIT and some other features for this session.

This mode can also be enabled by pressing on the hamburger menu while Firefox is open, clicking Help, selecting Troubleshoot Mode and confirming this on the modal dialog that appears. Please note this will require a browser restart.

This mode was previously named Safe Mode until Firefox 88.

Firefox refresh

Some issues experienced by users in Firefox may be caused by profile issues, such as corruption.

If you have ruled out other causes, it may be worth trying a new Firefox profile for testing purposes to see if this will resolve your issue. More information on how to create a new profile and switch between profiles can be found on the Firefox support page:
Profile Manager - Create, remove or switch Firefox profiles | Firefox Help

If this resolves your issue, you should switch back to your original profile and consider refreshing your Firefox.

Refreshing your profile will retain all browsing and download history, bookmarks, web form auto-fill data, cookies, personal dictionary and passwords, and will transfer them to a brand new profile without extensions, themes, extension data and preferences, among other data. A backup of your old profile will also be retained.

To refresh your profile, navigate to about:support, press Refresh Firefox and confirm this on the modal dialog that appears. about:support can also be accessed by pressing the Hamburger menu, selecting Help and then clicking More troubleshooting information.

More information on refreshing your Firefox, including further details about what is transferred to the new profile, can be found on the Firefox support page:
Refresh Firefox - reset add-ons and settings | Firefox Help

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I’m running Firefox on several machines running Manjaro KDE, Gnome, and all using Wayland. I have no problem with bookmarks. I do not however have an NVIDIA GPU.

Can you please include Firefox version, how you installed it, Manjaro branch, KDE version, NVIDIA driver version, etc. Also a better description of exactly what is happening compared to what you expect should happen.