Hi,

You can try to check this in a new profile. If the new profile is okay, you can then Reset Firefox on the old (previous) profile via Help (Alt + H) > Troubleshooting Information.

Do you get an error message?

If you see a bar that Firefox has prevented the site from redirecting, you can turn that off here:

orange Firefox button or classic Tools menu > Options > Advanced

On the "General" mini-tab, uncheck the box for "Warn me when websites try to redirect or reload the page"

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

• Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

• Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Use Troubleshoot Mode in Firefox to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).

• Don't make any changes on the Safe mode start window.
• https://support.mozilla.org/kb/Safe+Mode

You can also check the network.http.* prefs and reset all bold user set network.http prefs to the default value (network.http.proxy.keep-alive should be true) via the right-click context menu > Reset.

• http://kb.mozillazine.org/about:config

See also:

• https://support.mozilla.org/kb/Resetting+preferences