Replaced non-Mozilla product Fluent terms w/ regular string in /browsers/compare/ update

[reemhamz]

One-line summary

In a previous PR where we removed mentions of IE and updated Fluent string IDs, I kept the Fluent terms of non-Mozilla products in the new versions of the Fluent string IDs. Flod flagged them in this PR. I managed to now replace the Fluent terms with strings.

Initial PR where these string IDs were created: #14167

i.e.
string-about-safari = Comparing { -brand-name-safari } --> string-about-safari = Comparing Safari

Issue / Bugzilla link

mozilla-l10n/www-l10n#375

Testing

• http://localhost:8000/en-US/firefox/browsers/compare/
• http://localhost:8000/en-US/firefox/more

[reemhamz]

@flodolo let me know if this is good to go

[flodolo]

Thanks, that's exactly what I was asking for 👍🏼

There is one typo, and one open question about Safari and Windows.