Javascript bookmark stopped working in Firefox 13
bookmarklet, bookmarks, firefox, javascript
Solution
This is a consequence of Bug 728313 - Using a bookmark keyword to a bookmarklet fails on new tabs, also Bug 739387 - Aurora 13a New Tab display doesn't allow javascript bookmarks to be selected . This bug affects Firefox 13 onwards.
As a consequence of the fix to bug 723808, `javascript:` bookmarks are disabled in a just-created new tab. If you first load almost any URL, including `about:blank`, then a Javascript bookmark will work in that tab.
Note that this is about Javascript bookmarks (bookmarklets). You cannot use this workaround to load `javascript:` URLs typed directly in the location bar. These have been disabled since Firefox 6, as a consequence of bug 656433 (phishing of `javascript:` URLs). Bug 680302 is a feature request to allow turning `javascript:` URLs back on through a preference. Valadrem has written the InheritPrincipal extension to remove this restriction (I haven't tested it). You can still type and run Javascript code in the Scratchpad (press Shift+F4, type code, press Ctrl+R).
There are restrictions on the Javascript you can run from the URL bar or from a bookmark. For example, since Firefox 7, you cannot resize the window (consequence of the fix to bug 565541); the `services.sync.prefs.sync.dom.disable_window_move_resize` controls this restriction.
Problem
In Firefox version 13, bookmarklets (bookmarks with a `javascript:` URL, e.g. `javascript: alert("it works")` stopped working. Is there any solution to use `javascript:` bookmarks in Firefox 13?