My Firefox does not open anymore?

A couple days ago my Firefox stopped opening. I click on the icon a million times and nothing happens. I can't think of any reason why it would suddenly do this. When I tried to delete it and redownload it, a box popped up saying I needed to close Firefox before proceeding. But it wasn't open so I had nothing to close, and consequently I couldn't download it again!

Hit '''Ctrl R''' on your keyboard. This will bring up Run. Type '''taskmgr.exe'''. Find the processes tab. Locate '''firefox.exe''' and end the process. This should allow Firefox to run. If you find the problem continues:
One of your add-ons might be the culprit. Try running Firefox in [[Safe Mode]]. If that solves the problem, see [[Troubleshooting extensions and themes]] and possibly [[Troubleshooting plugins]]
~~~~~~~~~~~
If that does not solve the problem, [http://support.mozilla.com/en-US/kb/Managing+profiles#Creating_a_profile Create a new profile] Then, Recover your data from the old profile. See http://support.mozilla.com/en-US/kb/Recovering+important+data+from+an+old+profile
Also see [[Firefox will not start]]

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