Could you please elaborate more on the errors and if possible supply the url's. I gather this is The Extended Release. ? Current version for that is 52.4.1 It is showing that you are at just ver 52 with information sent. Could you try updating from Help --> About, please. Could it possibly be your Video Card drivers need updating to access pages ? https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration and try https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors Please provide requested info. Please let us know if this solved your issue or if need further assistance.