Rated 1 out of 5 stars

per Shudushi el ago. 28, 2017 ·

It WAS one of my favorite Add-on's, but v1.7.1 doesn't work anymore with Firefox v55+.

You can find a similar, but still working Add-on here:
https://addons.mozilla.org/en-US/firefox/addon/browsizer

It works for me on 55.0.3 (32bit) together with Add-on "New Add-on Bar" here:
https://addons.mozilla.org/de/firefox/addon/new-add-on-bar

Hope it does it also 4U!

Rated 5 out of 5 stars

per Shudushi el abr. 30, 2014 ·

Doesn't work anymore in Firefox 29.0.
Before it was a 5 star add-on.

UPDATE: 2014-05-02: Thank you for your hint about "The Addon Bar" extension. Now 5 stars again and great support man!

per orev (desenvolupador) a abr. 30, 2014 ·

I recommend installing "The Addon Bar" extension to restore the addon bar to Firefox 29. Every extension that uses it has been affected by the changes introduced in Firefox 29.