[current] Cleanup prefs for "Recommend (extensions/features) as you browse"

[laniakea64]

Fixes #1058

[hawkeye116477]

I edited main.xul, main.js and firefox.js on #1213. I hope that doesn't cause conflicts.

[laniakea64]

I edited main.xul, main.js and firefox.js on #1213. I hope that doesn't cause conflicts.

It looks like these two PRs touch entirely different parts of those files, so it should be fine, shouldn't it?

[laniakea64]

Hi @MrAlex94 did I understand your intent correctly when I looked into this in #1058 (comment) ? Do you need anything else from me in order to review and merge this PR?