You can try these steps in case of issues with web pages:

Clear the cache and cookies only from websites that cause problems.

"Clear the Cache":

• Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

• Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

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 (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

• Do NOT click the Reset button on the Safe Mode start window.

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Also make sure that you aren't blocking cookies.

You can inspect and manage the cookies for the domain in the currently selected tab:

• Click the "Site Identity Button" (globe/padlock) on the location bar
• Click "More Information" to open "Tools > Page Info" with the Security tab selected
• Click "View Cookies" to view the cookies for the domain in the currently selected tab

Tried all the above and still not fixed.

Hello,

Go to "TOOLS" >>: "PAGE INFO">> : "PERMISSIONS" >>: "SET COOKIES" : "ALLOW"

Else you can try Reset Feature. The reset feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks and open tabs. Please See this: Refresh Firefox - reset add-ons and settings

See also:

• http://kb.mozillazine.org/Websites_report_cookies_are_disabled