Troubleshooting extensions and themes * https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes Clear Cookies & Cache * https://support.mozilla.com/en-US/kb/Template:clearCookiesCache How to Clear the Network Cache * https://support.mozilla.com/en-US/kb/How%20to%20clear%20the%20cache Firefox cannot load websites but other programs can * https://support.mozilla.com/en-US/kb/Firefox%20cannot%20load%20websites%20but%20other%20programs%20can Check and tell if its working.