On occasion, loading a Netflix streaming video may cause the Firefox browser to crash. Diagnosing the issue involves troubleshooting the software elements, including the Firefox browser, the Silverlight plug-in or any other augmentations to the browser. Less commonly, older hardware can contribute to crashes while watching Netflix.
Always watch Netflix streaming content using the most up-to-date browser version. To check if your Firefox browser is up to date, open it and click on “Help” and then “About” to check what version of Firefox you're running. Firefox will tell you what version you're running and whether it recommends an update. Firefox can then automatically download and install the update, if needed.
Netflix uses the Microsoft Silverlight plug-in for digital rights management with its streaming video library. A problem with Silverlight, such as corrupt installation or upgrade, may cause Netflix to crash the Firefox browser. If you suspect Silverlight for causing the Netflix crash, uninstall Silverlight, reboot your machine and then reinstall. The uninstallation process differs for different versions of Windows as well as Mac, so consult the official Microsoft Silverlight page to find the uninstall process for your computer.
Firefox allows you to install third-party add-ons called extensions that are small programs that augment Firefox's functionality. Extensions may cause problems with streaming video services such as Netflix. If you've recently installed or updated an extension and subsequently experienced issues with Netflix playback, either disable or uninstall the extension. To disable an extension, click "Firefox," "Add-ons" and "Extensions." Click "Disable" on the extension you suspect may be causing the problem and then restart Firefox to check if this resolves the issue.
Uncommon issues that can cause Netflix to cause Firefox to crash include video card issues, memory issues and Internet speed. Watching Netflix an an old or low-end machine with very old graphics card. Whenever possible, confirm that the computer that you're using to watch Netflix streaming content meets or exceeds the minimum hardware requirements of a 1.2 GHz processor, 512MB RAM for PC or an Intel-based Mac with at least 1GB RAM. If your computer meets these minimum requirements, close down all programs except for Firefox to help alleviate the stress on your computer while watching streaming video and keep it from crashing. Watching videos at lower quality can help with any stuttering problems that may lead to a browser crash. You can lower your streaming video quality on your Netflix account.