I've reviewed the source code of the XPI for v1.7, and have no privacy concerns: this does what it says on the tin, and nothing else.

20200526Tue: I updated to latest FF & List Tabs extension. List Tabs finishes parsing through more than 300 tabs, but crashes Firefox when List Tabs results tab is accessed, wiping-out all the hard work List Tabs did listing all the tabs. To prevent this crashing and solve somewhat similar problems that other users are experiencing, functionality similar to many other FF extensions & web pages that would generate the List Tabs results instead of on a new FF tab, have an option to generate the List Tabs results directly to a .txt file with a popup dialog asking the user which file system folder the List Tabs results should be saved ... alternatively, by default, just save the List Tabs results .txt file in the "Downloads" folder where it can easily be accessed. 5 stars if the latter functionality is added! ... plus, a HUGE Thank You to the developer for all efforts and many long hours developing & maintaining this otherwise fine FF extension! ~~~~~ ><(((;> ~~~~~

Been using this for a couple of years by selecting text by tapping the screen, then tapping on "copy all" and pasting into an email and sending to myself.

Now suddenly I can't select or copy the text. Why? What could have changed?

ADDED AFTER DEVELOPER RESPONSE: Thanks for your response! That would be terrific to have a simple button for copying. Even when it worked, onscreen copying can be difficult.

The inability to copy now might have something to do with a recent Samsung Android update or perhaps something with Firefox. I can copy other html pages in other tabs I have open in Firefox just by touching the text and then a little box somes up with Copy/Share/Select All/Google Search, and I press "Select all". I notice that the URL for tablist.html begins with moz-extension://etc etc. Could that be responsible for some sort of protection on the page?

Great add on, very stable and also works on Android.

No Problems, very useful,

It generated a list of about half of my 60 tabs.
EDIT:
I don't know how to reply. I hope you're getting this: Android 7.1.x Moto X Play

Excellent extension ! This is the only one that works correctly on Android, thanks a lot !

[Revised] Works as advertised.

You can make it better, but it's nice to start