In fact, do this for all plugins that are configured to always activate unless you have configured. If you have multiple Flash plugins here, do the same for them. They add features to Firefox to make browsing faster, safer, or just plain fun. Locate Shockwave Flash here and switch from 'Always Activate' to 'Ask to Activate'. Add-ons for Firefox Android (en-US) Extensions are like apps for Firefox. Switch to Plugins using the left sidebar. supports playing locally downloaded/stored *.swf files (as long as they're not published for the AIR desktop runtime) + thanks for /u/PornoOnMyAppleIIe for pointing out the hidden option to enable this. Type about:addons in Firefox's address bar and hit enter. If it works for you then consider enabling this option yourself in 'about:config' browser DPI scaling is disabled due to poor flash support for high DPI displays. no flash updates/no browser update (update system deliberately crippled so practically will work forever)

You can use my already packaged portable version of Firefox from this link: In addition to the tutorial I also had to break the Firefox update services, because at some point it would update itself silently and break the flash plugin. Following this tutorial I've managed to put together an older portable Firefox browser (ver.70) packaged with an older Flash player (that doesn't contain the time bomb).

Android firefox flash plugin