stevespringett

disable-webassembly

Web Development2018–2023

stevespringett / disable-webassembly

disable-webassembly

Browser hacks to disable WebAssembly (WASM)

Web Development Security & Privacy

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5Distinct people

5Mentions

0Explicit recommenders

122GitHub stars

REPOSITORY AT A GLANCE

What to know before exploring

What it is

Browser hacks to disable WebAssembly (WASM)

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

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 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM 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 year5 dated mentions

Observed mentions: 2018-06-25 01:19:11 UTC to 2023-05-09 14:50:45 UTC.

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.
Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
2018	2018-01-01 00:00:00 UTC	2019-01-01 00:00:00 UTC	1	0	1
2019	2019-01-01 00:00:00 UTC	2020-01-01 00:00:00 UTC	2	1	1
2020	2020-01-01 00:00:00 UTC	2021-01-01 00:00:00 UTC	0	0	0
2021	2021-01-01 00:00:00 UTC	2022-01-01 00:00:00 UTC	1	0	1
2022	2022-01-01 00:00:00 UTC	2023-01-01 00:00:00 UTC	0	0	0
2023	2023-01-01 00:00:00 UTC	2024-01-01 00:00:00 UTC	1	0	1

What Hacker News says

5 sources

JohnFen·May 9, 2023

Just in case those who prefer not to allow Java need this, here's some info about disabling WASM in various browsers. https://github.com/stevespringett/disable-webassembly

In CheerpJ 3.0: a JVM replacement in HTML5 and WASM to run Java on modern browsers

nominated1·Apr 13, 2021

For Chrome you can also run: chrome --js-flags=--noexpose_wasm More info for other browsers and platforms: https://github.com/stevespringett/disable-webassembly

In Chrome zero-day released on GitHub – fixed on V8 but still works on latest

tus87·Apr 22, 2019

If you want to pull the chain on this diarrhea: https://github.com/stevespringett/disable-webassembly

In Mozilla announces WebAssembly System Interface, what JVM should have been

DyslexicAtheist·Apr 10, 2019Submission

How to Disable WebAssembly (WASM)

5 points · Open discussion

enzanki_ars·Jun 25, 2018

Edit: I just remembered that WebAssembly has JavaScript based polyfills. Disabling WebAssembly does not do me much good, as it will still run. I will leave my original comment below to remain a frame of reference for replies, but they are based on a flawed thought process of mine. --- I have yet to see a real reason for browsers to enable WebAssembly with out at least a permission dialog like location services, alerts, flash, etc. The only thing I have heard that uses the feature is the CryptoCurrency miner mentioned in the article and some random demos released by Mozilla. First thing I am doing when I get back to my laptop is finding where the hidden flag to disable WebAssembly is in Firefox and Chrome, as an ad blocker can only go so far with blocking this. I could be very wrong, but I see noting but potential for abuse. If I run acros

Read the rest

s a legitimate use case, I can re-enable the feature on demand. Edit: https://github.com/stevespringett/disable-webassembly/blob/m... Seems like disabling the feature is a difficult task in all browsers that have WebAssembly except Firefox.

In Changes in WebAssembly Could Render Meltdown and Spectre Browser Patches Useless