Hello,
I know, nobody wants to pay subscription, including me.
The price you pay is in big part a donation to the developer (me).
And as you can see on my Patreon, I'm not exactly rich.
I could get a normal programming job and make about 3 times more, but then I would have no time to work on my many extensions.
And I would rather be poor and useful to ordinary people than be rich and useful to some big corporation. At least that's what I thought when I quit my job 10 years ago. I'm not sure it was a good move anymore...
I'm sorry for the bad news :(
Best Regards,
Juraj Mäsiar

Hello,
You can customize the group layout in the "Edit group" window - right click group name or open main menu and click "Edit group".
More info about layouts:
https://github.com/fastaddons/GroupSpeedDial/wiki/Group-layouts
See also introduction video for more tips:
https://www.youtube.com/watch?v=mgAJTjrcIRI
Best Regards,
Juraj Mäsiar

Hello,
Group Speed Dial version 26.0 is still compatible with Firefox ESR 115, you can install it from here:
https://addons.mozilla.org/firefox/addon/groupspeeddial/versions/
(click the "[Download file](https://addons.mozilla.org/firefox/downloads/file/4348052/groupspeeddial-26.0.xpi)" below the change log)

Sadly, I can no longer bring back support in the current version of my addon due to missing JavaScript features in Firefox ESR 115. Even the newer ESR 128 is getting too old and in a few months will be replaced with Firefox ESR 140.

But the version 26.0 should work fine.

Best Regards,
Juraj Mäsiar