Comment 6 for bug 249656

I think there could be done some modification in Edit -> Preferences -> Advanced
-> Scripts & Plug-ins -> Allow scripts to. The checkboxes (some of them) should
have three states: unchecked for disabling the feature completely,
"semi-checked" (checked box with gray bg or whatever) for allowing the feature
only for windows opened with JavaScript (window.open()), and checked for
allowing the feature completely.
We hate when sites resize the browser window on their start page. On the other
hand this feature is great when viewing some gallery - clicking a thumbnail
usually opens a window using window.open() method, and such windows should be
resizable by JavaScript (as they usualy resize to fit the image they show).

This would also solve the JS-resizing of the tabbed windows, because JS-windows
don't open in a tab.