Can anyone recommend an add-on for Firefox Quantum which will let you resize the browser window to a new size, from a list of sizes which you can define?
Up until now, with Firefox ESR (pre-Quantum), I had been using the very useful Browsizer add-on, but Browsizer is not compatible with Firefox Quantum, and no longer appears to be maintained, unfortunately.
- Must be able to define an indefinite number of window sizes (at least 8: many of the WebExtension add-ons which I have found so far seem to only allow a maximum of 4 window sizes to be defined)
- Must let you access the settings for the add-on via its toolbar button (so that you can easily add/remove/edit the list of sizes without having to open the Add-ons Manager)
- Would be useful to be able to also set a window position for a particular window size setting (but this must be an optional setting, as there are only certain occasions where I do want to both resize and reposition a window)