The extension forces the browser to refresh about 5 seconds after launch. Sometimes the extension causes the browser to freeze up and the only solution is to force close firefox. This does not appear to happen with the extension on Chrome. The firefox extension clearly is not a priority for Windscribe (the prompt to review the firefox extension even says to post on the Chrome store!) and it hasn't been updated in months despite multiple complaints by other users on Windscribe's subreddit.