Does one thing and does it well, my only wish is that it would support pinning multiple tabs when they are selected. Someone has made a pull request on GitHub that does this, so any users who know how to build extensions from source can fix it on their own.

Thank you! Could you add an update to support pinning/unpinning multiple selected tabs? That would be great! Thanks!

Good, but need to Pin/Unpin by Mouse Double Click on Tab. If you can to do this, It will be very usefull.

(re: Thank you, but Right click menu on tab is exist in FF... I'm looking for an alternative for an addons that will not support WebExtension eg. Tab Mix Plus or Find Bar Tweak or Panic Button and so on...)