Firefox Community Forum

I just tried to open Firefox and got the message "The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem". DO NOT redirect to this link

https://support.mozilla.org/en-US/kb/fix-bookmarks-and-history-will-not-be-functional?as=u&utm_source=inproduct&redirectslug=The+bookmarks+and+history+system+will+not+be+functional&redirectlocale=en-US

It is useless. I tried to restore 3953 items from a previous back up and received the message "Unable to process the backup file".

I am not interested in hearing how to prevent this problem in the future, because obviously creating backups do not work.

How do I check to see if the problem was caused by security software, even though I have not added anything?

Using Firefox ESR 115.30 in Windows 7 Ultimate, I routinely open multiple tabs, then, at the end of the day or session I'll bookmark them all into a new folder and close them all.

Later, I might return to that folder and choose to open say, 5 of the group. Is there a way to select all 5 (without opening any) and once I've finished selecting them, have all 5 open at once? Rather than just one at a time? So far it seems that I have to open them one by one.