I cant delete my search history, i just updated my Firefox and every time i clear my "form and search history" it wont work. I tried everything, I went clear history and checked everything even my cookies but my search history just wont delete? why is this happening?
It is possible that there is a problem with the file that stores the "Saved Form" data.
Rename or delete formhistory.sqlite (plus formhistory.sqlite-journal and formhistory.sqlite.corrupt and formhistory.dat, if they exist) in the Profile Folder in case there is a problem with the file that stores the "Saved Form" data.
This will remove all saved form data, so you may want to rename formhistory.sqlite to formhistory.sqlite.sav or move the file to another folder in case you need to recover some saved data.