Firefox-mienskipsfoarum

Using Firefox 135.0.1 with Mac OS 15.3.1. Sometimes the menus on the left side of the top menu bar (, Firefox, File, Edit, View, History, Bookmarks, Tools, Window, Help) vanish from the menu bar at the top of the screen. The items on the right side of the menu bar are unaffected and remain visible. If I click in the menu bar area, the items that had disappeared return.

This does not occur with Safari or Chrome, only with Firefox and only infrequently.

Curious to know if it's a bug or something else.

I just got a new PC. On my old Windows 10 PC, many add-ons add useful buttons, for example OneTab which adds a button that closes all tabs and compiles a list of what was there, or Zotero, which lets me send stuff online to my Zotero citation database.

Now on my new Windows 11 PC, even though those add ons are installed and technically functional, I can't find the buttons anywhere. I wanted all that stuff on my toolbar for a reason. All I can find are convoluted keyboard shortcuts. I don't want to use a bunch of stupid keyboard shortcuts when I'm supposed to be able to just push a button for the same functionality.

Where did all my buttons go and how do I put them back? No, they are not in the "customize toolbar" option, and I have checked the options menus for my most important add ons too.