Try switching to another persona. In order to switch to another persona that you had previously installed, do the following:

1. Go to Tools and click Add-ons (or click the Firefox button at the top left and click Add-ons).
2. Switch to the Appearance tab. You should find your previously used personas in the list.
3. Find the one you want to use and click the Enable button.

To uninstall the other ones you can click the Remove button on them and they'll be uninstalled instantly.

Hello caandrews, try to delete places.sqlite file (including "places.sqlite-journal" and any "places.sqlite.corrupt" files, if found) in profile folder and check it again.

see for more information : Locked or damaged places.sqlite

thank you

I fixed this by moving from FF17 to 18. Nothing else seemed to work. I had to go to the Firefox download site - the automated updater failed too. I think the problem was caused by a failed update.

Make sure that you do not run Firefox in (permanent) Private Browsing mode.

• https://support.mozilla.org/kb/Private+Browsing

• Tools > Options > Privacy: Use custom settings for history
• Deselect: [ ] "Always use private browsing mode"

I also recently had this problem. I discovered that the issue was related to computer issues corrupting my most recent update from Firefox. Re-downloading Firefox 19 got rid of the problem.

In the Clear Recent History window, at the top, Make sure Time Range to Clear is set to Everything. After the update it must have set it to Last Hour Only automatically.