September 2010
The Firefox Input Button Line-Height Bug
Basically, Firefox is setting the line-height to “normal” on buttons and is enforcing this decision with an !important declaration. This is a frustrating decision on their part, particularly considering (as Eric Meyer has pointed out at great and detailed length), line-height: normal is anything but.
December 2009
StartupMaster :: Modules pour Firefox
Asks for the master password at startup (fixes multiple password prompt)
November 2009
October 2009
Getting multiple master password prompts when loading several tabs at startup
That issue has recently been fixed on the current trunk builds (Minefield 3.6a1), but not in Firefox 3.5.x
faq - swfobject - SWFObject FAQ - Project Hosting on Google Code
16. Why does Firefox load my SWF twice?
Firefox 3 has a known issue that sometimes causes a swf to be 'double initialized'. The problem appears to be fixed in their codebase, but has not been released yet. See the following bugs for more details: bug 438830 and bug 445599.
Or, if you have "Disable cache" selected in your Firefox Web Developer Toolbar extension a double load will occur.