Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache.
Note: This will temporarily log you out of all sites you're logged in to.
To clear cache and cookies do the following:
Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history.
Under "Time range to clear", select "Everything".
Now, click the arrow next to Details to toggle the Details list active.
From the details list, check Cache and Cookies and uncheck everything else.
Spent an hour searching everywhere to enable cookies, nothing worked until I found you. fixed it so fast, less than 30 seconds. I'm so glad you were here. Thanks. 5:22 AM and I'm still at it. Got windows 8 today, hate it, installed Mozilla Firefox. Been fighting this thing all day and night. WHEW, I'm wore slap out. Stay vigilant my friend, a lot of us need help. Lol
Yes, your method works absolutely well. For some reason i could not enter to my gmail account, and to my you tube channel. This happened when i press "OK" to the following application:
Then google accounts advise me to enable cookies in Mozilla browser ( and in any other web browser ). Only by your way it works and now i can have access again to gmail and you tube channel.