error message Platform version 127.0.2 is not compatible with minVersion >=127.0.1 maxVersion <= 127.0.1
After auto update this error message came up and will not allow Firefox to open. Earlier in the day it had also updated ( not sure to what version) and was working fine. Laptop was then shut down and turned off for aprox. 1 hr. I then turned it back on and tried to open Firefox and it again asked to allow Firefox to make changes to my computer to which I clicked Yes. It then would not open and this error came up. error message Platform version 127.0.2 is not compatible with minVersion >=127.0.1 maxVersion <= 127.0.1
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Install Firefox again with a full installer. You shouldn't lose any data.
The full offline setup for Windows can be downloaded from https://www.mozilla.org/firefox/all/#product-desktop-release as downloading Firefox from Windows from mozilla.org may serve you the small online stub installer.
An error message like XPCOM missing or about platform version or entry points not found can happen because of a failed Firefox update that left you with a mixture of old and updated files in the Firefox installation folder.
This can happen in case security software was keeping a handle of some of the files in the Firefox program folder preventing Firefox from replacing all the files.
You may have to disable security software temporarily in case the problem persists.