You might be able to figure things out and fix it. Use which, and look in your home for the firefox you said you installed from a tar. If these commands find something, that will give you a hint, you might have two versions. I'm guessing that the ppa ver can be removed with apt. The tar ver you should probably just delete from wherever you untared it to, but check that you did not run some script to install that.3hre wrote: ...
Regarding Firefox; I got the tar off of Firefox's page under the Firefox for Linux link and since there was were no further specifications/choices assumed, apparently erroneously, that it was not an issue. Is there a more reliable source? I don't really want to think about having to do this but would it be a good idea to just scrub my HD and do a fresh install?
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$ which firefox
$ ls ~/firefox/firefox
https://wiki.debian.org/Firefox
p.s. that ppa repo needs to go, find it under /etc/apt/somewhere and get rid of it, probably in a file in sources.list.d? yeah it's there because you showed that apt policy says it is there. If you have installed anything else from there along with another program, or apt upgrade or similar commands then you probably will need to reinstall the os to fix it.