Ubuntu 20.04 LTS, Firefox 96 Sidebar empty

[Olfried2]

Hello, in the already described environment, the sidebar is empty. I already did the following

• opened closend firefox,
• put sidebar to the other side
• opened window, iframe
• disabled, enabled
• restart machine
• delete cookies

sidebar keeps empty. bookmarks and history (that's what I use) will be filled with content. I'm not sure if there was an update of firefox or something else today (security updates are always on) Maybe something happened when I openend "outlook.office.com" that was the moment the sidebar "cleared". Any idea what to do? Thanks in advance

[zluca]

Any idea what to do? Try to delete extension completely and then reinstall it.

[Olfried2]

Zluca, thanks for this hint (could have tried it by myself :) ) Problem resolved