My Default Apps "Choose an App" for web browser shows two entries for one app. One app works, the other does not. How can I remove the entry that do

[RonaldGast]

I uninstalled Firefox from my computer then reinstalled it. When I went to read the .pdf files, I got an error message that the Firefox account could not be found. I then looked at the default apps for reading .pdf and found there were two listings for Firefox. I switched the default to the second Firefox account and the .pdf files could be read. I then went to the Settings for the web browser and also found two listings for Firefox. I then switched this to the one that worked for the .pdf files. How can I get rid of the Firefox listing that does not work?

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