Mozilla has joined Google and Microsoft in the crusade against Adobe Flash content on the web. While revolutionary and useful back in the day Flash plugin has also been notoriously unstable leading to browser crashes, poor performance, and increased power consumption. As such, first Chrome, then Edge, and now Firefox will be blocking Flash content going forward. With Firefox, Mozilla has revealed that it will be blocking specific Flash content on their list. This list will later be expanded later this year to include the use of Flash to check content viewability, commonly used to...
Source: http://www.gsmarena.com/mozilla_to_start_blocking_flash_content_in_firefox-news-19527.php