User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.12) Gecko/20100908 Iceweasel/3.5.12 (like Firefox/3.5.12) Build Identifier: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.12) Gecko/20100908 Iceweasel/3.5.12 (like Firefox/3.5.12) Firefox should have a preference to disable cursor (mouse pointer) shape manipulation. Some web sites set "cursor: none" on large areas. This is annoying and makes text selection more difficult. Reproducible: Always Steps to Reproduce: 1. n/a This was also requested in bug 346690.

Maybe the pref only needs to ignore 'cursor:none' and 'cursor:url()' ? I think those two are the only ones that can make the mouse pointer invisible.

The ability to force mouse and/or to disable it, via pref, could be interesting for kiosk/TV/dashboard apps.

With the add-on CodeInjector (https://addons.mozilla.org/en-US/firefox/addon/codeinjector/) you can solve this problem. I believe the non-security related issues which belong to the webpage itself should not be handled/solved by any browser app. The webpage therefore its creators are responsible for it.