Rated 4 out of 5 stars

Contrary to what the last review says, this addon seems to handle CTRL and SHIFT selections perfectly. The Zip to Placeholder function is a good idea, but executed as a code-filled tab with a generic title. Combined with the first review warning of possible corruption, this doesn't exactly inspire confidence.

Check out "Allow multiselect operations on tabs," it's these functions at their very simplest and works great
https://addons.mozilla.org/en-US/firefox/addon/bug-566510/

Rated 3 out of 5 stars

Cannot select multiple tabs with shift or ctrl click and keyboard shortcuts don' work otherwise would rate this 5 star.

Please fix these as this could be a great utility for power users of tabs

Rated 5 out of 5 stars

Great add-on, i recommended it to anyone who has a lot of tabs opened at the same time.So far i haven't had any problems with it, i just hope to maybe see more features in the future!

Edit : After using the add-on for a longer period i noticed that i've lost some of my tabs. It may be because of this add-on, so be careful!