All Systems

* After installing this version, users will not be able to return to a previous beta version of Firefox 3.5 without creating a new profile (see bug 488966)
* Restoring your bookmarks from a backup can take some time, during which the browser may seem unresponsive (see bug 493731)
* If a pop-up window is focused when you enter Private Browsing Mode, the Location Bar in the first Private Browsing Mode window will not be editable. Opening a new window fixes the problem (see bug 495495)
* After using Clear Recent History some SSL sites will not load all images and styles without pressing reload (see bug 480619)
* When editing Arabic, Hebrew, Hindi or Persian scripts, the characters may appear disconnected. Reloading the page or copy and pasting the content over top of itself will fix the problem (see bug 499538)
* Firefox 3.5 will only support color profiles as specified by ICC v2, later versions will add support for ICC v4 (see bug 463221)
* Users viewing images using ICC v2 color profiles on monitors with wide gamut levels may find them to look more saturated (darker) than expected (see bug 497363)
* Websites using the new downloadable font support that wish to change the color using :hover will also need to add text-rendering : optimizeLegibility for font sizes less than 20 pixels (see bug 495455)
* Some sites which require Java to javascript communication may not work properly (see bug 484744)
* Some sites with Flash can cause problems with the Cookies dialog (see bug 495035)
* Web pages can no longer automatically install PKCS11 cryptographic tokens. Users are now required to do this manually or install an Add-on that installs them (see instructions and documentation)