How can I fix a "Plugin Container for Firefox has stopped working" at the end of each test case completion Applicable for Firefox 43 or lower. To stop this error pop-up - Go to the folder where Firefox is installed Default location is: C:\Program Files (x86)\Mozilla Firefox Remove all the entries that are plugin-container.exe and you should stop receiving those error pop-up. Last updated: June 02, 2023 If you have any feedback on this topic, please contact us at documentation@appvance.ai