Windows & Windows Vista Known Issues
* If the browser is installed in a non-default location, software updates may fail. You can reinstall the software to the default location, or to a non-default location as long as the install folder is named "Mozilla Firefox". Alternatively, you can start Firefox by right-clicking on its icon and selecting "Run as administrator" from the menu.
* When you launch the browser after it has downloaded a software update, you may get a dialog asking to permit "updater.exe" to run. If you do not allow this operation, the software update will fail.
* Firefox can not yet be set as the default browser on Vista. See this bug for more information.
* When installing as a restricted-access user on a shared machine into a location that you can write to, there may still be negative side effects (default browser/other keys not being set correctly). When installing as a restricted access user do not attempt to install over an existing installation in a restricted-access/shared location as this may destroy that installation.
* Firefox may hang when closing after viewing a PDF file in some older versions of the Adobe Acrobat Reader plug in. If you experience this, make sure you are using the newest version of the plug in.
* The Update directory on Windows Vista is located under the user's directory, in AppData\Roaming\Mozilla\Firefox\Updates\.
* Other known issues with Windows Vista can be found in the Vista tracking bug.