Review for Tab Clicking Options by ZeBoxx
Rated 5 out of 5 stars
on-topic: awesome extension!
off-topic-ish:
@AbandonInPlace and @Netscapist
Alternatively, download the "Nightly Tester Tools" add-on. This allows you to override the version check per-extension without the need for manual editing. YMMV.
To create your own collections, you must have a Mozilla Add-ons account.