That change came in Firefox 6.0. It is a security fix in Firefox.
https://bugzilla.mozilla.org/show_bug.cgi?id=656433

Most JavaScript commands will still work from a Bookmarklet, but a few need to be run from the Scratchpad.
Firefox > Web Developer > Scratchpad or {Shift+F4}

http://www.bookmarklets.com/
http://en.wikipedia.org/wiki/Bookmarklet

As far as scripts that resize the main window.
https://bugzilla.mozilla.org/show_bug.cgi?id=656433

It is actually the opposite. All scripts should work as a bookmarked bookmarklet and may not work in the Scratchpad or the command line of the Web Console. Bookmarklets that open a new window (tab) via window.open() do not work properly when run via the Scratch pad.

Some bookmarklets code only work if an XUL window like about:addons or about:config is open.
That is the case with the above mentioned move and resize JavaScript codes on the main window.

Most vs All is more like partially correct rather than opposites.

Any hints on which bookmarklet code only works in an XUL about: window?
All XUL about: windows or just certain ones?

Thanks for the answers... I guess I will get back to using IE again... I find it very useful to write and execute javascript code from the location bar.

I think that NoScript has a setting that allows to run JavaScript via the location bar.

• http://forums.informaction.com/viewtopic.php?f=18&t=6488&p=27991