Be careful with old versions!
These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.
Remove support version 37 and less
Fixed due to Bug 1051017.
Known problem: Zoom level does not preserve after tab detached.
Fix migration code so that it works Aurora22.0a1.
Fixed due to Bug 829456 use nsIContentPrefService2
Fixed zoomlevel display for image document.
Add "use strict"; to js file.
Fixed bug, mouse wheel zoom sometime fails to apply, (all version)
Fixed bug, zoom level sometime reset if background tab loading, (all version)
Improve Firefox17 compatibility
Fixed: Some button icons are wrong in Customize toolbar dialog on Firefox 4.0.x.
Changed: Change shortcut key due to conflict with Bug 616015 - Add a keyboard shortcut to reveal and hide the add-on bar, (TextZoomIn:Ctrl+, TextZoomOut:Ctrl+. TextZoomReset:Ctrl+Shift+? ).
Improved: Button image now cached for Firefox4
Dropped support for Firefox3.5.x. For Firefox3.5.x user, please use version 4.3
Improved: Compatibility with Firefox4.0
Changed : Firefox4.0; DefaultFullZoom Toolbar Button was added instead of Show Zoom Level in statusbar
Fixed: Commented out debug code.
Fixed: Workaround Bug 622507.
Fixed : Remove padding of tool button for Firefox 4.0
Fixed : Text color for dark color background theme.
Revised (Minefield3.6a1pre): with the check-in Bug 487656 - zoomed in by default while entering Private Browsing
Zooming was not applied the case of the following conditions at the time of starting of Firefox.
A. There is only one tab.
B. The check dialog of a regular browser is displayed.
Changed default value("Reserve Sidebar Width..." and "Show Zoom Level in statusbar")