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mozilla
shumway
TypeScript2012–2023
mozilla / shumway · Archived

shumway

Shumway is a Flash VM and runtime written in JavaScript

Web DevelopmentLanguages & Compilers
Explore on GitHubRead Hacker News discussions
46Distinct people
50Mentions
2Explicit recommenders
3.7KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Shumway is a Flash VM and runtime written in JavaScript

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

Yes, I really love PDF.js. I was consider switching to Chrome just because of the (proprietary) pdf viewer. But the Chrome PDF viewer even lacks the concept of pages! I had…

fafner used a recommendation phrase. 2 indexed comments match. This is a phrase match, not a verdict.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 8:27:21 AM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year50 dated mentions

Observed mentions: 2012-02-22 13:23:49 UTC to 2023-03-31 11:33:10 UTC.

024682012-01-01 00:00:00 UTC to 2013-01-01 00:00:00 UTC (exclusive): 8 mentions; 3 submissions, 5 comments20122013-01-01 00:00:00 UTC to 2014-01-01 00:00:00 UTC (exclusive): 8 mentions; 2 submissions, 6 comments2014-01-01 00:00:00 UTC to 2015-01-01 00:00:00 UTC (exclusive): 4 mentions; 1 submissions, 3 comments2015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 6 mentions; 0 submissions, 6 comments2016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 5 mentions; 0 submissions, 5 comments2017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 4 mentions; 0 submissions, 4 comments20172018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 5 mentions; 1 submissions, 4 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 4 mentions; 0 submissions, 4 comments2020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 4 mentions; 1 submissions, 3 comments2021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20122012-01-01 00:00:00 UTC2013-01-01 00:00:00 UTC835
20132013-01-01 00:00:00 UTC2014-01-01 00:00:00 UTC826
20142014-01-01 00:00:00 UTC2015-01-01 00:00:00 UTC413
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC606
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC505
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC404
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC514
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC404
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC413
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC000
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC101
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC101

From the project README

An excerpt from the repository, fetched Nov 13, 2026.

Read the project’s introduction
Shumway Shumway is an HTML5 technology experiment that explores building a faithful and efficient renderer for the SWF file format without native code assistance. Shumway is community-driven and supported by Mozilla. Our goal is to create a general-purpose, web standards-based platform for parsing and rendering SWFs. Integration with Firefox is a possibility if the experiment proves successful. Getting started Online demo For an online demo, visit: http://mozilla.github.io/shumway/examples/racing/ Or see all the demos at http://mozilla.github.io/shumway/ Extension Install the Firefox extension: http://mozilla.github.io/shumway/extension/firefox/shumway.xpi This development extension should be quite stable but still might break from time to time. Also, note that the development extension is updated on every merge and by default Firefox will auto-update extensions on a daily basis (you can change this through the extensions.update.interval option in about:config, time is in seconds). To build the Firefox extension: use grunt firefox. Contributing Development See the wiki. If you don't want to hack on the project or have little spare time, you still can help! Just install the Firefox extension, test it on SWFs in the wild, and report any problems or unimplemented features. Our GitHub contributors so far: https://github.com/mozilla/shumway/contributors You can add your name to it! :) The easiest way to get started is to grep for TODOs and implement them. Additional resources Talk to us on IRC: #shumway on irc.mozilla.org Post on our mailing list: dev-shumway@lists.mozilla.org Subscribe either using lists.mozilla.org or Google Groups: https://lists.mozilla.org/listinfo/dev-shumway http://groups.google.com/group/mozilla.dev.shumway
Read the full README on GitHub

What Hacker News says

4 sources
nnethercote·Dec 24, 2014
> So I take it this means that Mozilla is reopening "Mozilla Labs". No. Mozilla Research and Mozilla Labs were distinct entities. From http://www.ianbicking.org/blog/2014/09/professional-transiti...: "Note that Mozilla Labs is distinct from Mozilla Research – Research is the home of projects like Rust and ASM.js. Mozilla Research is still going strong. To make a broad distinction between the two groups: Research has worked on foundational technologies for the web, especially related to programming languages, while Labs was product-focused. Also Research has been led by Brendan Eich and now David Herman, with what appears to be a fairly clear vision and succession. Labs was led by a number of people with different interests and different visions – some people with an eye to external validation, some looking to spur disruptive (also uncomfo
Read the rest
rtable) changes in Mozilla, some hoping to enable and include external contribution." > It's interesting to see Shumway on there as I was under the impression the project was put on hold. Shumway is definitely under active development. See https://github.com/mozilla/shumway/ for details and commit history.
In Mozilla Research Projects
cpeterso·Jul 21, 2014
Mozilla's Shumway replacement for Flash uses TypeScript. Shumway's TypeScript translates ActionScript to JS. The Shumway team chose TypeScript for a few reasons. TypeScript's syntax is pretty close to ActionScript's, which simplifies the mapping from ActionScript to Shumway's implementation of Adobe's Flash APIs. Using three languages (AS, JS, and TS) also helps enforce modularity between the content (AS), compiler, runtime, and JITted (JS) code. https://github.com/mozilla/shumway/
In TypeScript: New Compiler and Moving to GitHub

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