What is ruffle
Ruffle is a Flash Player emulator written in Rust. Ruffle runs natively on all modern operating systems as a standalone application, and on all modern browsers through the use of WebAssembly. Leveraging the safety of the modern browser sandbox and the memory safety guarantees of Rust, we can confidently avoid all the security pitfalls that Flash had a reputation for. Ruffle puts Flash back on the web, where it belongs - including iOS and Android!
Flash chrome plating A very thin layer of chrome generally consisting of deposits with a thickness of 0.0002' to 0.0005'. Suitable for applications needing light wear and corrosion protection, reduced coefficient of friction, improved release properties, and with tight tolerances where post plating processes are not practical. To enable Flash for a specific website, first open your Chrome browser and type chrome://settings/content in the address bar, then press enter. Then on the Content Settings page, scroll down and click the Flash button Make sure that the toggle is set to Ask first (recommended) (2). This will ensure that you are able to allow Flash for specific.
Designed to be easy to use and install, users or website owners may install the web version of Ruffle and existing flash content will 'just work', with no extra configuration required. Ruffle will detect all existing Flash content on a website and automatically 'polyfill' it into a Ruffle player, allowing seamless and transparent upgrading of websites that still rely on Flash content.
Ruffle is an entirely open source project maintained by volunteers. We're all passionate about the preservation of internet history, and we were drawn to working on this project to help preserve the many websites and plethora of content that will no longer be accessible when users can no longer run the official Flash Player. If you would like to help support this project, we welcome all contributions of any kind - even if it's just playing some old games and seeing how well they run.
HTML5 by default has shipped and we are currently in the process of ramping up the SEI threshold, per the schedule below.
Currently 87.5% of population have an SEI threshold score of 4 and 12.5% has a threshold score of 8 (we do this to measure the impact of the threshold change). By the end of the month we will progress on to the next phase on the ramp and everyone will be at least at 8.
HTML5 by Default was initially rolled out to 1% of Chrome 55 Stable users (December), followed by a full deployment (i.e. to 100% of users) in Chrome 56 Stable (February).
Flash prompting will only be enabled for sites whose Site Engagement Index (SEI) is below a certain threshold. For Chrome 55, starting in January 2017 prompts will only appear for sites where the user’s SEI is less than 1. That threshold will increase to 100 through October 2017, when all Flash sites will require an initial prompt. As a reminder, users will only be prompted once per site.
Chrome Flash 2020
Here’s a summary of thresholds and % of users:
Chrome Flash Settings
Site Engagement Threshold
User % Enabled
1 (Stable 55)
1% (Stable 55), 50% (Beta 56)
100% (Stable 56)