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About this Add-on
How to use?
Alt + Left Arrow: Decrease the width of the window by 1px
Alt + Right Arrow: Increase the width of the window by 1px
Alt + Up Arrow: Decrease the height of the window by 1px
Alt + Down Arrow: Increase the height of the window by 1px
(Add Shift to any of the combinations to change it by 10px)
When you find your break point the tiny icon in the toolbar will tell you the exact size of you browser window.
Where do I find the toolbar icon?
Right click on the toolbar and pick "Customize..." in the drop down. Drag and drop the FireBreak icon in the toolbar.
New: Option to show the height of the window in the toolbar icon
Updated: The options screen has a new look
This add-on is not compatible with your version of Firefox because of the following: