Firefox Nightly 29.0a1 2014-01-17 on Windows 8.1 Pro 64 bit On about:config, the Reset button is always styled as disabled except directly after changing value. Steps to reproduce: 1. Open about:config. 2. Search for |extensions|. 3. Change extensions.enabledScopes from 1 to 2. Actual result: Reset button gets styled as enabled. 4. Click a different setting. 5. Click again on extensions.enabledScopes Actual result: Reset button is styled as disabled (clicking on it works as expected). Same applies for closing and opening about:config.
Mass close of bugs in obsolete product https://bugzilla.mozilla.org/show_bug.cgi?id=1350354