Installed Microsoft updates yesterday & today I click on Firefox and it does not load. If I go to download a new Firefox, it tells me to close existing Firefox before the download. I can't see Firefox open anywhere.

Firefox will not load and I cannot download a new Firefox because it says I have to close the existing one. I cannot find the existing one open anywhere. Also, when I went to download I got a warning that the new Firefox might damage my computer.

The procedures in the [[Firefox will not start]] article may help, in particular it sounds like this error [[Firefox is already running but is not responding]]

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