Например, очень уж удобным мне кажется вот эта настройка New Tab button

A few things about myself and this release:

    I am a regular tab utilities user and as such, I am strongly motivated to see this add-on remain under active development.
    I am new to firefox extension development. Please bear with me as I learn the intricacies of add-on development.
    I also have a full-time job that is my primary focus. I will only be able to respond to the most pressing of matters as time allows.
    This is a preliminary release using fixes from blackwind and "soin at windpr dot tw". I tried to keep only the changes necessary to keep the add-on working as it has in the past. I also fixed some minor bugs. As of today (2013-08-24), the add-on is still awaiting review.
    As stated above, my primary goal is to maintain existing functionality. However, I do plan to refactor the code to gain a better understanding of its inner workings and hopefully fix some bugs in behavior.
    This is a Preliminary release. Once I've set up a test plan and become more comfortable the code I will submit it for Full release. I hope to be able to do that by the time FF25 or 26 are released.
    FF17-20 are not supported. For the time being anyway. The fixes break backwards compatibility. Since existing solutions (1.5.1 and 1.6pre3) work fine, I have deemed backwards compatibility to be a lower priority.
    I have not set up testing for the alpha channel and do not have plans to do so in the immediate future.
    Chinese support will be minimal. I am keeping the existing chinese translations but since I do not speak chinese (nor do I have a human translator handy), any new text will be written in english for the time being.

Тем временем, некто stux взялся за поддержание жизни TU https://addons.mozilla.org/en-us/firefox/addon/tab-utilities-phoenix/

Renegade пишет

в опере всплывают маленькие превьюшки хоть

TabScope:)