The latest version of Firefox will NOT update on my laptop or desktop, and the "firefox" button has disappeared. How to fix?

I tried to update Firefox on my desktop since version 33.0 I continue to download and upgrade or install day, but nothing changes. Gmail still says the browser is not supported, and Mozilla says I use an older version and need to update. I downloaded from different places - the links provided when he said outdated sound and go directly to Mozilla.org for download. In fact, I uninstalled Firefox and tried to install instead of upgrade. It does not help. My computer says I have the latest version, but the internet plays an older version. Also my "firefox" button and another add on buttons are missing from the navigation bar, so I can't check 'about' to see what version of the browser itself says that it is running. How can I fix it? I use Firefox for years and this is the first problem I had that I can't fix.

And... your check of software I actually running version 11. Clearly, it is not up-to-date.

Your useragent is corrupt, or that you use Firefox 11.0 appears.
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; RV:11.0) Gecko/20100101 Firefox/11.0 WBSMTWB020

https://support.Mozilla.org/en-us/KB/websites-say-Firefox-outdated-or-incompatible

https://support.Mozilla.org/en-us/KB/how-reset-default-user-agent-Firefox

Tags: Firefox

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