Huge variety of accents are easily created but then vanish. Add-on is broken.

This used to work with thunderbird, but alas no longer does. A good replacement is the AddAccent extension, which works in a very similar manner.

Functional but a bit slow to start up first time. Fast otherwise. In a different language than english but not too important there's only a few text boxes/buttons. Doesn't copy direct to clipboard; would be nice to remove hassle. A little complicated. Can't find any advertised "context menu". (EDIT: Now I can; didn't see that it's in the FF context menu) EDIT 2: Alt-X doesn't work. Context menu too complex (would be nice if there were the last used language in the popup and then a submenu to change it) Decent otherwise.

It did work some years ago. But seems to have stopped the Macro functions (Oct. 2020). Right Click still works, you get 2 stars for that.
Specially bad is the lack of proper instructions. So I add :A=Ä|:a=ä|:O=Ö|:o=ö|:U=Ü|:u=ü|:s=ß (where? about:addons or alt+k?) - I type :+a - and then what? How to execute?
A better manual and a few working examples would be great!
An English version would be great too. The hoover text is icelandig or something else.

Perfetta! La uso da sempre e non riesco a farne a meno.

Unfortunately, I have not found a good manual for the app. I do not really understand the 'help' at http://lingvo.org/abctajpu.
Basically, I find the idea of Esperanto good, but the user interface should be in English, because a lot more people understand that. It would be even better to offer different languages. I would like to help with a translation into German.
At the moment it is frustrating to figure out how to use the app properly.

Windows10x64, Firefox63x64:

Functionality is ultimately broken since Quantum.

Now "User Defined Macros" are completely destroyed.

Declaration of alt-k binding is false. Just false.
Alt-c is effective in very rare occasions.

All and every non-favourite languages form-up a kilometre-tall menu that is mostly unusable.

And esperanto hints here-and-there are plain derision and humiliation of a user.

Fixes are urged:
1) repair alt-x to work everywhere
2) repair alt-k whatever it does. I never had a chance to know-out what it is supposed to do
3) repair user macros
4) replace entire history of humankind languages with the only favourite languages for pop-up.

Until then this add-on is useless.

Edited:
Example of broken websites: web.whatsapp.com, slack.com, wikipedia.org, ... most of sites. And addons.mozilla.org here too.
Macros are mostly default: https://justpaste.it/6xnpm
Alt-K is not reserved in Windows10Firefox64, it just fails to work.
"fr, de, es" defines a killometre-tall popup with all letters possible.

Unfortunatelly does not seem to work with google docs, anything I might be doing wrong or does it actually not work there?

Superb. Full access to every UNICODE letter there is (that I can tell at least) from right-click menu. Very well done.

Minus one due to reduction in symbols that used to be available in the older version - these were really useful, would like to see them reinstated.

Hi, Thanks for this great AddIn!

Only thing i miss since the "newer" Versions: The MES2XX signs. (eg the Zodiac-Signs)
Or am I only to blind to find them?

I don't know what changed, but it updated and suddenly I can't use the INS shortcut, and I can't configure it because the menu cuts off and the instructions are unclear. Typing [letter][accent], then typing INS and having the accent 'jump' onto the letter, was WAY easy and I really wish that feature would come back, because I got used to using it.

Is it still possible to chose your own Hot-Key ? I looked for it, but was unable to find out how.