refactor(firefox): switch to schizofox

[justinrubek]

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[justinrubek]

I think this is feasible to use at this point. The only thing I'd like to see is a more up-to-date version of firefox used by schizofox. Actually, you can specify a custom package. However, there are issues with using firefox-devedition due to how profiles are handled. I'm not sure of a good way to use devedition separately from schizofox without the same issues so that is not solely a schizofox issue.

I've placed a comment about this on their repo schizofox/schizofox#47

I've also forked the repo and made a few changes that fit me better: https://github.com/justinrubek/schizofox

• rename the desktop item to Firefox as I don't intend to start typing Schizofox to launch the browser
• this has been reverted, but I changed how the wrapper is generated to support firefox executables that don't have the name firefox. See justinrubek/schizofox@657b33e