Rated 5 out of 5 stars

Why isn't this built-in yet?

Looks great. Rated 5 out of 5 stars

Should be built-in by default.

Very cool Rated 5 out of 5 stars

Great work. Installing add-ons feels more integrated now.
I saw the mockups for installs in a tab, but I prefer this doorhanger approach/style.

I'd love for it to work with local installs. Nearly all add-ons that I download are tested/reviewed in a profile other than my primary one.

Rated 5 out of 5 stars

Nice. Needs a close button and - please please please! - make restart notification seen on all tabs when I install extensions.