In Firefox 138.0 beta the open sidebar Bookmarks are forgotten when closing/starting.

[BentNielsen]

In Firefox 138.0 beta the open sidebar Bookmarks are forgotten when closing/starting, please correct this so the opened sidebar are "remembered".

[siffemcon]

https://bugzilla.mozilla.org/show_bug.cgi?id=1921536

[raybender101]

The issue has just shown up on the release of 138.0.1 that I just updated. No issues before. I have to go into tool bar to reset each time I open Firefox. I have the bookmark side bar set to always show, but it never does. !!

[Agentvirtuel · Accepted solution]

Hello

An subject https://connect.mozilla.org/t5/discussions/firefox-138-bookmarks-not-opened-after-1st-instance/td-p/...
https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved try delete xulstore.json file.

[BentNielsen]

Thanks 👍, it solved me problem.

[ZarroTsu]

This issue is affecting me as well. Deleting xulstore.json does *not* fix the problem.

If the sidebar is opened and set to 'History' - it will remember that it was set to History so long as the sidebar remains open when Firefox is closed.

If the sidebar is closed when Firefox is closed, it forgets which menu it was set to, and reverts to displaying 'Bookmarks'. This behavior was not present in previous versions, and deleting xulstore.json is not solving the problem for me.