Is the problem limited to the button? For example, does it work to use any of these:

• Ctrl+d
• right-click the page > star icon
• (menu bar) Bookmarks > Bookmark This Page

It's a little puzzling that some things fixed the problem, but only temporarily. When bookmarking stopped working, did you notice any other changes around the same time?

The first two don't work. I wanted to clarify that by menu bar, you mean the star button? If so, that doesn't work.

The only other thing I noticed is that FIrefox no longer saves whatever tabs I had open when I previously closed Firefox. I usually close it with my mailbox open (Yahoo) and now when it opens, it goes to the default home page.

Could you check these settings:

(1) Whether Firefox is set for automatic private browsing

"3-bar" menu button (or Tools menu) > Options > Privacy

If the selector says "Firefox will: Never remember history" change it to "Firefox will: Use custom settings for history"

If the box for "Always use private browsing mode" is checked, uncheck it and allow Firefox to restart (assuming you do not have any pending work/transactions that would get lost

(2) Whether Firefox is set to clear history at shutdown

Further down on that panel, if the box for "Clear history when Firefox closes is checked", click the Setting button and make sure "Browsing and download history" is NOT selected

(3) Your startup setting

"3-bar" menu button (or Tools menu) > Options > General

If it does not already say "When Firefox starts: Show my windows and tabs from last time" go ahead and select that

I think that covers the main things. Does Firefox restore your session at the next startup?

1. I changed it and it reverted back when I restarted.

2. "Clear history" was NOT checked.

3. I don't have that option...

My session wasn't restored when I restarted.

We have a help article on possible reasons that changes such as starting normally might not be saved. Could you review this for things you have not tried yet and see whether any of them are helpful: How to fix preferences that won't save.

I'm at the bottom of those options, the prefs.js part. In my profile folder, I have just a prefs file, no .js after it. Since it's not exactly the same, I didn't want to delete it without checking if that was the right one or not.

I was thinking about when the issue with the bookmarks started and realized that it was when I updated to 40. I just reinstalled 39 and bookmarks work again. I know for security reasons I should stay with the newest version but I need Firefox to work!

We didn't discuss extensions as a potential issue because you mentioned using Refresh. In case the problem returned after reloading some extensions, I read on another site that various IE Tab extensions and possibly the Tree Style Tab extension could be affecting the bookmark dialog.

I noticed that all forms of "Bookmark this page" stopped working after I upgraded to the newest Firefox. Now the only way I can add a bookmark is to show all bookmarks and use the add button there. Nothing else works.

I did see that someone mentioned that the IETab extensions could be causing the problem and I do have that - but I have to have it for work as some of out internal pages will not work otherwise.

Hi VMGuru, although IE Tab extensions are convenient, you still could use IE separately from Firefox. There are extensions to make it easy to launch IE for a given link, such as https://addons.mozilla.org/firefox/addon/open-in-ie/