*Firefox/Tools > Options > Privacy > 'Use custom settings for history' > Cookies: 'Show Cookies' *Firefox/Tools > Options > Advanced > Network > Cached Web Content: 'Clear Now' *Press 'Ctrl + F5' or press 'Ctrl + Shift + R' (Windows,Linux) *Hold down the Shift key and left-click the Reload button Read this answer in context 👍 1 All Replies (7) Do NOT click the Reset button on the Safe Mode start window.Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance.Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem. Firefox/Tools > Options > Privacy > 'Use custom settings for history' > Cookies: 'Show Cookies'.'Remove Cookies' from sites causing problems: Firefox/Tools > Options > Advanced > Network > Cached Web Content: 'Clear Now'.Press 'Ctrl + F5' or press 'Ctrl + Shift + R' (Windows,Linux)Ĭlear the cache and remove cookies only from websites that cause problems.Hold down the Shift key and left-click the Reload button.You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files. You can try these steps in case of issues with web pages: Your System Details list shows that you have preferences that were used in previous Firefox versions and that are no longer supported in the current Firefox release.ĭelete possible user.js and numbered prefs-#.js files and rename (or delete) the prefs.js file to reset all prefs to the default value including prefs set via user.js and prefs that are no longer supported in the current Firefox release. Websites look wrong or appear differently than they should.Websites don't load - troubleshoot and fix error messages.Can't Login to some sites & none of the given solutions work.security.disable_button.openCertManager: False.plugin.disable_full_page_plugin_for_types: video/x-mpeg,video/mp4,video/x-ms-wmv,application/,application/vnd.fdf,application/+xml.browser.history_expire_days.mirror: 180.ANGLE (Mobile Intel(R) 965 Express Chipset Family (Microsoft Corporation - WDDM 1.1) Direct3D9Ex vs_3_0 ps_3_0)

Enabling cookies mozilla firefox 40.0.3