HackerReposA FIELD GUIDE TO OPEN SOURCE
ProSponsor the shelf♧ 0
← Back to top all-time
mozilla-firefox
firefox
JavaScript2025–2026
mozilla-firefox / firefox

firefox

The official repository of Mozilla's Firefox web browser.

26Distinct people
27Mentions
0Explicit recommenders
13.8KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

The official repository of Mozilla's Firefox web browser.

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

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 4:01:40 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 month27 dated mentions

Observed mentions: 2025-05-12 16:22:07 UTC to 2026-10-12 02:30:36 UTC.

02462025-05-01 00:00:00 UTC to 2025-06-01 00:00:00 UTC (exclusive): 7 mentions; 3 submissions, 4 commentsMay 20252025-06-01 00:00:00 UTC to 2025-07-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2025-07-01 00:00:00 UTC to 2025-08-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2025-08-01 00:00:00 UTC to 2025-09-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2025-09-01 00:00:00 UTC to 2025-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2025-10-01 00:00:00 UTC to 2025-11-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2025-11-01 00:00:00 UTC to 2025-12-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2025-12-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2026-01-01 00:00:00 UTC to 2026-02-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 commentsJan 20262026-02-01 00:00:00 UTC to 2026-03-01 00:00:00 UTC (exclusive): 3 mentions; 1 submissions, 2 comments2026-03-01 00:00:00 UTC to 2026-04-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2026-04-01 00:00:00 UTC to 2026-05-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-05-01 00:00:00 UTC to 2026-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-06-01 00:00:00 UTC to 2026-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-07-01 00:00:00 UTC to 2026-08-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-08-01 00:00:00 UTC to 2026-09-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2026-09-01 00:00:00 UTC to 2026-10-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2026-10-01 00:00:00 UTC to 2026-11-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 commentsOct 2026

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
May 20252025-05-01 00:00:00 UTC2025-06-01 00:00:00 UTC734
Jun 20252025-06-01 00:00:00 UTC2025-07-01 00:00:00 UTC202
Jul 20252025-07-01 00:00:00 UTC2025-08-01 00:00:00 UTC101
Aug 20252025-08-01 00:00:00 UTC2025-09-01 00:00:00 UTC202
Sep 20252025-09-01 00:00:00 UTC2025-10-01 00:00:00 UTC000
Oct 20252025-10-01 00:00:00 UTC2025-11-01 00:00:00 UTC202
Nov 20252025-11-01 00:00:00 UTC2025-12-01 00:00:00 UTC101
Dec 20252025-12-01 00:00:00 UTC2026-01-01 00:00:00 UTC303
Jan 20262026-01-01 00:00:00 UTC2026-02-01 00:00:00 UTC110
Feb 20262026-02-01 00:00:00 UTC2026-03-01 00:00:00 UTC312
Mar 20262026-03-01 00:00:00 UTC2026-04-01 00:00:00 UTC303
Apr 20262026-04-01 00:00:00 UTC2026-05-01 00:00:00 UTC000
May 20262026-05-01 00:00:00 UTC2026-06-01 00:00:00 UTC000
Jun 20262026-06-01 00:00:00 UTC2026-07-01 00:00:00 UTC000
Jul 20262026-07-01 00:00:00 UTC2026-08-01 00:00:00 UTC000
Aug 20262026-08-01 00:00:00 UTC2026-09-01 00:00:00 UTC101
Sep 20262026-09-01 00:00:00 UTC2026-10-01 00:00:00 UTC000
Oct 20262026-10-01 00:00:00 UTC2026-11-01 00:00:00 UTC101

What Hacker News says

2 sources
I took a brief gander at its code [0] and saw it mainly focusses on k-means clustering algorithms (in JS, no less). To my ken this is likely for suggesting new tabs, something a user is even less likely to use than renaming them. Its constant drain even when not 'in use' seems to imply it's classifying tabs as they change page (though it might be telemetry or uncommented testing). If so, it's an example of premature optimisation gone very wrong. It's a shame, because it overshadows the fact that naming tab groups is a perfect use case for an LLM, alongside keyboard suggestions and reverse dictionaries [1]. I'm ardently distrustful of LLMs for many, many purposes, but for the tiny parameter and token usage needed it's hard to not like. Which is a shame it's (somehow) such a drain. [0] https://github.com/mozilla-firefox/firefox/blob/7b42e62
Read the rest
9fdef... exports a SmartTabGroupingManager, though how or why that is used without being asked eludes me [1] https://www.onelook.com/thesaurus/ Can be helpful in a pinch when a word's on the tip of your tongue, though its synonyms aren't always perfect.
In Hardening Firefox – a checklist for improved browser privacy
Fwiw the XSLT implementation in Blink and WebKit is extremely inefficient. For example converting the entire document into a string, to parse it to a format that's compatible with libxslt, to then produce a string and parse it back into a node structure again. I suspect a user space library could be similarly as effective. Ex. https://source.chromium.org/chromium/chromium/src/+/main:thi... https://source.chromium.org/chromium/chromium/src/+/main:thi... https://github.com/WebKit/WebKit/blob/65b2fb1c3c4d0e85ca3902... Mozilla has an in-house implementation at least: https://github.com/mozilla-firefox/firefox/tree/5f99d536df02... It seems like the answer to the compat issue might be the MathML approach. An outside vendor would need to contribute an implementation to every browser. Possibly taking the very inefficient route since that's easy t
Read the rest
o port.
In "Remove mentions of XSLT from the html spec"

MAKE YOURSELF AT HOME

A few shortcuts

/
Search the collection
?
Open this guide
Esc
Close dialogs and navigation

Your saved repositories and interests stay in this browser.