He is referring to <https://github.com/mozilla/firefox-ios>.
But you will note that none of those things are "in" Firefox. H.264 support in the <video> tag is implemented via platform-specific APIs (which, for example still don't work on OS X). DRM requires a CDM binary blob, which is again platform specific. You do not have the open-source freedom to port these features to some other platform that does not support them.
In BPG Image formatmozilla-mobile
firefox-ios
Swift2014–2026
mozilla-mobile / firefox-ios
firefox-ios
Firefox for iOS
38Distinct people
47Mentions
0Explicit recommenders
13.1KGitHub stars
What to know before exploring
What it is
Firefox for iOS
GitHub
Where it is used
No documented product use was verified in the last source check.
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
- mozilla-mobile/focus-ios · linked in 2 of the same discussions
Mentioned in the same Hacker News threads. That is not proof they are substitutes.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 7:56:55 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 year47 dated mentions
Observed mentions: 2014-12-05 00:29:43 UTC to 2026-08-16 17:14:08 UTC.
* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2014 | 2014-01-01 00:00:00 UTC | 2015-01-01 00:00:00 UTC | 4 | 1 | 3 |
| 2015 | 2015-01-01 00:00:00 UTC | 2016-01-01 00:00:00 UTC | 11 | 0 | 11 |
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 5 | 0 | 5 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 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 | 0 | 2 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 4 | 0 | 4 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 4 | 0 | 4 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 4 | 0 | 4 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 5 | 0 | 5 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2026 (partial) | 2026-01-01 00:00:00 UTC | 2027-01-01 00:00:00 UTC | 1 | 0 | 1 |
From the project README
An excerpt from the repository, fetched Nov 13, 2026.
Read the project’s introduction
Firefox for iOS and Focus iOS
Download Firefox iOS and Focus iOS on the App Store.
Firefox iOS
Focus iOS
Building the code
This is a monolithic-repository, containing both the Firefox and Focus iOS projects.
As this is an iOS project, it is required to have Xcode on your system, and you should check that xcode-select -p points to /Applications/Xcode.app/Contents/Developer (or however you've named your Xcode.app).
Automatic Installation (Recommended)
Steps: Automated Project Setup with FXIOS
Manual Installation
Clone the repo locally
For their related build instructions, please follow the respective project readmes:
Firefox for iOS
Focus iOS
Getting involved
We encourage you to participate in those open source projects. We love Pull Requests, Issue Reports, Feature Requests or any kind of positive contribution. Please read the Mozilla Community Participation Guidelines and our Contributing guidelines first.
You can file a new issue or research existing bugs
If more information is required or you have any questions then we suggest reaching out to us via:
Chat on Element channel #fx-ios and #focus-ios for general discussion, or write DMs to specific teammates for questions.
Open a ticket with your question.
Want to contribute on the codebase but don't know where to start? Here is a list of issues that are contributor friendly, but make sure to read the Contributing guidelines first.
License
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at https://mozilla.org/MPL/2.0/
Read the full README on GitHubWhat Hacker News says
4 sources100% of the C code is openssl
edit: https://github.com/mozilla/firefox-ios/search?l=c
In Firefox for iOS on GitHubYeah, this pull request fixes all of the actual errors that prevent building:
https://github.com/mozilla/firefox-ios/pull/30/files
In Firefox for iOS on GitHub