quick and easy to switch tab, however customize key doesn't really works, can't bind close tab to F4.

Awesome !!! we just need to install it and start using it using F1 and F2. Thanks for this add-on.

Great stuff. Since CMD/CTRL + SHIFT + L is existing shortcut for Firefox, it's broken on this addon. Do you think you can add any alternate shortcut?

Not sure if I'm doing something wrong, but I can't seem to find the toolbar icon after installing?? I have this add-on working on Chrome and it is fantastic so hope I can get it working here.

Very good one... but it's a pity thjat this extension just exists in v1 and nothing happened.
So i've submitted a fork without the annoying "F3 to Close" function.
https://addons.mozilla.org/en-US/firefox/addon/quicktabs-light/

日本製ブラウザSleipnirを使用していた頃からF2、F3でタブ切り替えを行っていたので、FirefoxではKeybinderを使用していました。
しかしVer57になり使用できなくなったためこちらに移行しました。
F2、F3へのキー割り当て設定が機能していないようですので、そちらだけ改善されれば完璧かと思います。

I like F1/F2 which are intuitive. But F3 - No, no, no! F3 is the Firefox 'Repeat Find' shortcut key which I use all the time, so accidentally close the tab. I accept that this extension is still in development because you acknowledge customization isn't possible - even though Options does show customize input boxes.

29Jul18 Update: V1.1 custom key binding doesn't solve problem of unwanted F3-Close behaviour. There is no information provided about what values can be entered, but by trial and error I found that if you type any value other than F1/F2/F3, when you press 'save' it is overwritten to the default F1/F2/F3. Suggested improvements:
1) Provide in-app guidance on entering custom keys.
2) Permit ALL F-keys: F1-F12.
3) Permit BLANK to indicate command not required: most likely to be used for CLOSE.
Developer's time and effort is always appreciated - thanks. For now, the alternative "QuickTabs Light" is my preferred app: https://addons.mozilla.org/en-US/firefox/addon/quicktabs-light/

Useful :)

FANTASTIC! Just the feature that I was looking for :D
OK, almost... I'd love it if the switching would work using the mouse wheel instead of F1 & F2 :)