Mozilla site thinks I'm using Firefox 33

Website of Mozilla it always tells me that I use an older version of Firefox. Whenever I discover an add-on, the install button is dimmed and he says "not compatible with Firefox 33" red. This despite the fact that I use Firefox 42, that is, the latest x 64 stable version downloaded directly from Mozilla. What happens here and how fix?

You have a masking the installed extension agent that changes the user agent:

  • User Agent: Mozilla/5.0 (agent masking; rv:33.0) Gecko/20100101

I see that at least six ask you questions before you have this modified user agent.

Fact this never caused a problem before?
You will need to make sure that you have the correct user agent.

Start Firefox in Safe Mode to check if one of the extensions (Firefox, Tools/menu key > Modules > Extensions) or if hardware acceleration is the cause of the problem.

  • Put yourself in the DEFAULT theme: Firefox, Tools/menu key > Modules > appearance
  • Do NOT click on the reset button on the startup window Mode safe

See also:

Tags: Firefox

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