This add-on makes Firefox usable for me, it is indespensible.

The Developer not wanting to add another form of authentication method for 2FA seems a bit over the top, admittedly: that's a recommended minimum authentication practice for any site (i.e., not a cure-all), will certainly become ubiquitous relatively soon and is certainly not just for use with financial institutions. Perhaps you will reconsider your latest position to discontinue support due to 2FA implementation for Developers.

Coming from Tabs Menu where I could scroll through over a hundred tabs easily from a menu-based list, the enforced move to WebExtensions really worried me. This add-on gives me a button I can place in about the same position and provides both a listing of all tabs, plus a quick way to search, close, etc. - more than I've had before! Very thankful for this work and while I realize the Mozilla WebExtension APIs are rather limiting, if you can see a way to perhaps offer a larger size for the pulldown list dimensions and allow for increased spacing above and below list items, that would be ideal. Otherwise, it's fast enough and keeps me productive, great work.

Update 12/2019: The Developer was HIGHLY responsive and updated the add-on to overcome a regression. Back to five stars!

Nice and promising addon in the style of "tree style tab" and other tab managers.

But please,
a) add a "F1" feature like TST for opening/closing the list of tabs in the sidebar,
b) add a feature to "size" the list according to user's eyes ..., (tabs height in the list)
c) add an "indent" feature in the list to show relations between tabs (without the parent-child-sibling thing that never works as it should).

In brief, keep it simple and functional !
I like your "forecasts" in the addon future as Firefox v57 will evolve to v. 58 ... So, one knows where things are going ...
;-)

Performance has recently decreased presumably from newer version ... previous performance was acceptable and more than satisfactory but recent version is a step in the wrong direction performance wise.

I have a tab habit. Coming from Chrome, where I used QuickTabs, I wanted a replacement that gave me search and a way to find duplicates. So far, I like this better than the Chrome extension.

So happy that you decided to migrate this excellent add-on to a web extension after all! It's already working great, and I'm sure it will only continue to get better. Far better than the Tab Search extension I had been using since upgrading to FF57. Thank you Kevin!

I just started using All Tabs Helper. I REALLY like the close buttons on the tab list. That is the entire reason I installed it. So nice to be able to close tabs without activating them.

OTOH, the drop down should be able to span the entire FF window if you have that many tabs open. Also there should be an option or default behavior to not list pinned tabs. My pinned tabs almost take up the entire list length leaving me just a space of 5 tabs to scroll thru my 250 open tabs. See the problem?

Is there any way to replace the default dropdown tabs list with ATH, like it was pre-WE?

Legalcy ATH is amesome, I hope all needed API will be quickly added by Mozilla ! I want to see ATH in the WebExtension format as good as it was before.

I Love "All Tabs Helper". I've been using it for years. I can't browse the web without this Addon. I am a Firefox user mostly (I Love Firefox, than any other browser). Sometimes I use Chrome too. Which I have installed an almost similar extension/Addon in Chrome named "Tab menu".
But in Firefox this Addon does much more than its similar one in Chrome.
You have also Fixed a bug which showed HTML entities in menu item titles, on your recent Update. That's great!
Only one small notice... If Icons were a little Bigger in the panel would be perfect. (Not the text, just the icons of the webpages).
Excellent Job guys!! Thank you. :-)

But I love the legacy version so I'll downgrade to that.