I give this 5 stars because it does what I want it to without any hassle. My understanding is that Firefox reverts to a default size and position to help deter browser fingerprinting. So In theory if you open Firefox, restore your tabs from last session, and then use this app to resize to your preferred size, then wouldn't sites still be able to profile your browser based on the size you consistently resize to? To get around this, I used this extension's three save states to save three slightly different screen sizes (all within a few pixels of each other's height and width). That way I can maybe obfuscate my browser's profile a bit. A nice feature would be to have this extension give you the option to resize the window to random dimensions within a user-definable tolerance of pixels. That would essentially automate the process I am now doing manually, and would provide more variability in window size, instead of cycling through three settings like I do now. Meanwhile, thanks for this useful extension!

does exactly what i wanted it for!

AWESOME! Just discovered it today and it helps me in a great way. I need some different sizes during the day and sometimes need to switch fast. And that it also can be positioned on the screen as you want is perfect. Just remember ALT and the number. Easy peasy.

Absolutely perfect add-on! This saves a lot of time and frustration rezising and positioning windows manually.

Finally!!! Someone made a great resizing tool. Thank you!

Been looking for this resizing tool since 57! Great Work!

Working on v57 awesome! Don't know how i survived without this.