Can't delete from history any site I click delete but nothing happens
On screen there are a list of web sites that I have viewed. I have tried to delete all that are not required. I click on top right hand corner icon, get the list on which the bottom is delete history. I click on this but the site remains. I can't remove any of them.
You can check for problems with the places.sqlite database (bookmarks and history) in the Firefox profile folder.
If "Verify Integrity" on the "Help -> Troubleshooting Information" (about:support) page cannot repair places.sqlite then remove all places.sqlite files in the Firefox profile folder. Firefox will rebuild places.sqlite and restore the bookmarks from a recent JSON backup in the bookmarkbackups folder.
- keep a backup copy of places.sqlite in case a new places.sqlite database has to be created