That won't happen as supporting the Tab bar in two positions requires a lot of extra effort to maintain. When Firefox is compiled then a lot of tests are run to ensure that everything works properly and this would require twice as many tests for the regular position on top and the lower position, this would include test for CSS code and tests for JavaScript that makes changes to the Tab bar. You are lucky that it is still possible to achieve this in Firefox via userChrome.css as with other browsers this isn't possible.

Sorry but I do not agree... In the very early stages (versions) of FF, this opportunity was built-in. At a certain moment in time, it was removed. A lot of people complained, a lot of addons were created, then, these addons broke one after the others.

When userchrome was introduced, this modification was one of the most requested. Now, even the userchrome.css are messed up during FF updates (last one for v109 for me - I found my tabs on the bottom of the window, and only the active one was visible).

We really need to stop to have to enter in debug mode after each update. You are telling this would be time consuming. Could be indeed, but did you ever compare with the thousands of hours spent by everyone for trying to fix his / her own browser manually, asking questions in online communities with all the trials and error ? This time could be spent on much more productive activities, so some more testing in nothing compared to that.

Conclusion, I restate my question : how to officially raise a request / complaint to revert to the original situation where this functionality was existing ?

Many thanks for your advice. Cheers !

You can post your current CSS code for the tabs below the Navigation Toolbar and I can code changes you need for 108+.

You need to comment out this rule for 108 and newer:

/* Firefox 107 and older */
/* #tabbrowser-tabs { width: 100vw !important; } */

You can also check this rule for reserving space.

/* navigator-toolbox: PADDING */
*|*:root:not([chromehidden*="toolbar"]) #navigator-toolbox {
  position: relative !important; /*needed in 89*/
  padding-bottom: calc(var(--tab-min-height) + 1px) !important; /*ADJUST*/
  background-color: var(--toolbar-bgcolor) !important;
}

Hi,

If you want to leave feedback for developers, you can use this link. Your feedback gets collected by a team of people who read it and gather data about the most common issues.

You can post your current CSS code for the tabs below the Navigation Toolbar and I can code changes you need for 108+.

Thank you for your (very fast) answer, and also for your willingness to help. I really appreciate it. But... sorry to say ... you are just proving my point.

You are kind enough to help me, here and now. You might also be able to help other users later, in another place. Some other advanced users are also helping since years, repeating again and again the same explanations, but the flow of questions is never drying out. The same requests are still asked... after all those years. Sooner or later, your patience will fade out... how many of you guys have already resigned in this time frame due to this kind of eternal loop ?

If you don't have to spend time in discussions like this one, you might be able to achieve much more valuable / interesting tasks / activities.

This is exactly why the only long term solution is to listen to the users, to have back this functionality. Everyone's sanity will be preserved.

Hence, I will not ask you to spend more time, I removed my userchrome so you won't have to enter yourself in debug mode. I will wait, hoping that this will be fixed quickly. Thanks again for everything.

Hi, If you want to leave feedback for developers, you can use this link. Your feedback gets collected by a team of people who read it and gather data about the most common issues.

Thank you for this link, I've just opened a topic.

https://connect.mozilla.org/t5/ideas/bring-back-the-tabs-bar-below-the-address-and-bookmaks-bars/idi-p/24795#M13482

No problem, thank you for letting us know.