Hello grajay, try to change to '''1''' the next preference value : '''browser.cache.check_doc_frequency''' in [http://kb.mozillazine.org/About:config about:config]. Follow the next steps : # In the [[Location bar autocomplete|Location bar]], type '''about:config''' and press '''Enter'''. The about:config "''This might void your warranty!''" warning page may appear. # Click '''I'll be careful, I promise!''' to continue to the about:config page. # copy and paste in the search field the next bold : '''browser.cache.check_doc_frequency''' # double-click on it and change the value to '''1''' # click OK (to save it), close the about:config tab, exit firefox and restart it. http://kb.mozillazine.org/Browser.cache.check_doc_frequency thank you

Just the job - very many thanks :)