# xifangczy/cat-catch

猫抓 浏览器资源嗅探扩展 / cat-catch Browser Resource Sniffing Extension

Repository: https://github.com/xifangczy/cat-catch
Canonical: https://ross.abutalabs.com/products/cat-catch
Homepage: https://cat-catch.94cat.com
Language: JavaScript
License: GPL-3.0
License Family: copyleft
Topics: chrome, chrome-extension, firefox, javascript, jquery, video-downloader, firefox-extension, m3u8-downloader
Last push: 2026-08-13T23:43:45+00:00

## Health v2 (maintenance only)
Score: 97/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 95, longevity 100
- inputs: {"age_days": 3904, "days_push": 20, "days_rel": 35, "gap_med": 28, "n_releases_24m": 18}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 21548, forks 1888 (observed 2026-08-28T04:11:31.810758+00:00)

## What it is
Cat-catch is an open-source browser extension that sniffs and lists media resources (video, audio, images) loaded by the current web page. It includes an M3U8 parser with decryption and merging, cache capture, screen recording, and integration with external downloaders like N_m3u8DL-RE and aria2.

## Use cases
- download videos from web pages
- sniff m3u8 streams in the browser
- capture audio and images from a site
- merge HLS segments into mp4
- record live streams or screen video
- find hidden media resources on difficult websites

## When to choose
- you want a browser-integrated media sniffer for Chrome, Edge, or Firefox
- you need to parse, decrypt, and merge m3u8/HLS streams without command-line tools
- you want to hook downloads into external tools like N_m3u8DL-RE or aria2
- you need cache capture or screen recording as a fallback when sniffing fails

## When to avoid
- you need to bypass DRM-protected video, which the extension cannot record
- you want a headless or server-side downloader rather than a browser extension
- your browser is older than Chromium 93 or Firefox 93
- you require guaranteed legality for downloading copyrighted content - responsibility is on the user

## Facets
- artifact type: plugin
- maturity: active
- function: web-scraping, video-processing, audio-processing, image-processing, developer-tools
- domain: browser-extensions, media, crawlers, web-development
- platform: browser-extension, browser, cross-platform
- tags: resource-sniffer, video-downloader, m3u8, hls, media-capture, screen-recording, chrome-extension, firefox-extension, media-downloader

## Member repositories
- xifangczy/cat-catch (main) score 97

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:31.810758+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:58:04.716643+00:00, confidence not recorded.
  - readme: https://github.com/xifangczy/cat-catch (fetched 2026-08-28T04:11:31.810758+00:00, sha c3d67d97de3c)
  - homepage: https://cat-catch.94cat.com (fetched 2026-08-29T07:56:57.640523+00:00, sha 5b29a12e4205)
  - site_page: https://cat-catch.94cat.com/docs/install (fetched 2026-08-29T07:56:57.643913+00:00, sha e73b3e2ece75)
  - site_page: https://cat-catch.94cat.com/docs/sponsor (fetched 2026-08-29T07:56:57.646291+00:00, sha 7a7851d6541a)
  - site_page: https://cat-catch.94cat.com/docs/settings (fetched 2026-08-29T07:56:57.648262+00:00, sha 6730b25432f2)
  - site_page: https://cat-catch.94cat.com/docs/m3u8parse (fetched 2026-08-29T07:56:57.650213+00:00, sha 21da69936b3d)
  - site_page: https://cat-catch.94cat.com/docs/cache-capture (fetched 2026-08-29T07:56:57.652176+00:00, sha 322e183d92b2)
  - site_page: https://cat-catch.94cat.com/docs/m3u8dl (fetched 2026-08-29T07:56:57.664285+00:00, sha b93736ce102a)
- Data as of 2026-08-30T08:39:29.467469+00:00.