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Make sure you are not blocking content.

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop

Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}acking-protection-firefox-desktop

I started firefox in safe mode and was able to log in to a website i then closed firefox which i presume was in normal mode ?

Closing Firefox when in Safe Mode, then restarting, starts the browser normally. Is the problem still there? If so,

It could be the work of one of your add-ons, or it could be Hardware Acceleration. How to disable Hardware Acceleration {web link}

Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; <Control> (Mac=<Command>) <Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All Of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again. Let us know who the suspect is, detective.

I still have this problem l tried logging into Amazon and got the message enable cookies also tried logging in to Hotmail and iCloud mail both I got wrong log in details I was right with my log in details for both mail accounts the instructions you have I don't know how to do ? If I can fix it I will dump Firefox browser.can I not just go to my extension in my adding and do what you are asking me to do ? the keys you ask me control Mac command shift A I don’t know how to press these keys ! I disabled all my addons and was able to log in two Amazon so what now ? I disabled all add-on and then closed FF and put them on one by one closing FF as I did that I was able to log on to websites the only add-on which caused a problem not logging on was forget me not addon so I think that as solved the problem unless you can suggest anything else ?>

if I delete my account from firefox does it remove everything ?

if I delete my account from firefox does it remove everything ?

If you are talking about sync, closing the account will only remove sync from the servers. The data on your computers will not be affected.