I can't connect to sites using Firefox 12.0; by clicking on the button doesn't do anything, it is locked/frozen.

"'I can't connect to the sites. After you fill out the username and password, when I click on the 'Log ON' button nothing happens. It's like clicking on a random place.

I tried: emptying the cache, delete all cookies associated with the website, history of the clearing, site pref, etc.. No joy.

Your help would be appreciated.

It is a sentence years: new installation of 12.0 FF. It is up to date.

I see your problem. Your useragent I messed up big time. Your useragent is a line of text that identifies what browser you use. A large number of sites search Web it and if they don't find something they recognize they break or turn to empty or possibly cause other weird questions. Your said AU: undefined GoogleToolbarBB so it seems that the Google toolbar caused this. You must reset it.

To reset the useragent:

Type of topic: config in the url bar and click on enter. Click I'll be careful . Then type useragent in the search box or the filter. If all the settings appear in "BOLD", right click on them and choose reset. Then close Firefox to save the changes.

To see the same instructions but with screenshots:

Websites report wrongly obsolete or incompatible firefox

Turning off modules:

If this isn't the problem, try to disable the HP Smart Web Printing add-on. I always remember hearing about weird problems with this addon about 2 years ago. I don't know if they have cleaned up their act since then. In any case, you can also try help > restart with disabled modules and see if that solves your problems. If so, you can activate each module one by one until you find the add-on causing the problem. Make sure you restart Firefox every time that you enable an addon.

Let us know what Add on is if you find so we can spread the word.

Cookies.sqlite erasure:

One another last resort where all the above fails, remove your cookies.sqlite file. It may have been corrupted. This step differs from the deletion of cookies with "clear recent history". Once you delete this file, Firefox creates a new to store all of your cookies.

See the article below to see how to delete the file:

Solve connection problems on Web sites that requires a user name and password

Tags: Firefox

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