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Application/Firefox Add-ons
Logo Firefox Add-ons

Firefox Add-ons

Firefox extensions and themes from Mozilla's own registry — daily users, weekly downloads, per-version signed files with their hashes, requested permissions, and licence.

Endpoints
5
Requests
12
Updated
3 hours ago
For LLMs
llms.txt
Endpoint healthnot yet measured
  • addonnot measured
  • searchnot measured
  • versionsnot measured
  • reviewsnot measured
  • authornot measured
no measurements yetdaily 01:00 WIB

Playground

5 endpoints
GET/v1/application:firefox-addons/addon1h cache2 paramschecking key…
Parameters
idstringrequired

Add-on slug, numeric id, or GUID

langstring

Locale for names and descriptions. Falls back to the add-on's own default. Default en-US.

·
Response
EXAMPLE
{
  "id": "ublock-origin",
  "url": "https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/",
  "file": {
    "url": "https://addons.mozilla.org/firefox/downloads/file/4940584/ublock_origin-1.73.0.xpi",
    "hash": "sha256:bccc51a773150af4af6e1fd62c7bfdeb7238b79ff2381b998fa9f2e38f64786a",
    "size": 4679419,
    "status": "public",
    "created": "2026-08-05T16:30:02Z",
    "mozillaSigned": false
  },
  "free": true,
  "guid": "[email protected]",
  "icon": "https://addons.mozilla.org/user-media/addon_icons/607/607454-128.png?modified=mcrushed",
  "name": "uBlock Origin",
  "tags": [
    "ad blocker",
    "anti malware",
    "anti tracker",
    "content blocker",
    "privacy",
    "security"
  ],
  "type": "extension",
  "price": 0,
  "rating": 4.8006,
  "source": "firefox-addons",
  "status": "public",
  "addonId": 607454,
  "authors": [
    {
      "url": "https://addons.mozilla.org/en-US/firefox/user/11423598/",
      "name": "Raymond Hill",
      "username": "gorhill",
      "developerId": "11423598"
    }
  ],
  "created": "2015-04-25T07:26:22Z",
  "license": {
    "url": "https://spdx.org/licenses/GPL-3.0-only.html",
    "name": "GNU General Public License v3.0 only",
    "slug": "GPL-3.0-only",
    "custom": false
  },
  "summary": "Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.",
  "updated": "2026-08-13T21:21:19Z",
  "version": "1.73.0",
  "category": "privacy-security",
  "homepage": "https://github.com/gorhill/uBlock#ublock-origin",
  "promoted": [
    "recommended"
  ],
  "developer": {
    "url": "https://addons.mozilla.org/en-US/firefox/user/11423598/",
    "name": "Raymond Hill",
    "username": "gorhill",
    "developerId": "11423598"
  },
  "categories": [
    "privacy-security"
  ],
  "dailyUsers": 10431348,
  "supportUrl": "https://old.reddit.com/r/uBlockOrigin/",
  "description": "uBlock Origin is not an \"ad blocker\", it's a wide-spectrum content blocker with CPU and memory efficiency as a primary feature.\n\nOut of the box, uBO blocks ads, trackers, coin miners, popups, etc. through the following lists of filters, enabled by default:\nEasyList (ads)EasyPrivacy (tracking)Peter Lowe’s Ad server list (ads and tracking)Online Malicious URL BlocklistuBO's own lists\nMore lists are available for you to select if you wish:\nEasyList CookieFanboy AnnoyancesAdGuard AnnoyancesDan Pollock’s hosts fileAnd many others\nAdditionally, you can point-and-click to block JavaScript locally or globally, create your own global or local rules to override entries from filter lists, and many more advanced features.\n\nFree.\nOpen source with public license (GPLv3)\nFor users by users.\n\nIf ever you really do want to contribute something, think about the people working hard to maintain the filter lists you are using, which were made available to use by all for free.\n\nDocumentationRelease notesCommunity support @ RedditContributors @ GitHubContributors @ Crowdin",
  "permissions": [
    "alarms",
    "dns",
    "menus",
    "privacy",
    "storage",
    "tabs",
    "unlimitedStorage",
    "webNavigation"
  ],
  "ratingCount": 22008,
  "reviewCount": 5805,
  "screenshots": [
    "https://addons.mozilla.org/user-media/previews/full/238/238546.png?modified=1622132421",
    "https://addons.mozilla.org/user-media/previews/full/238/238548.png?modified=1622132423",
    "https://addons.mozilla.org/user-media/previews/full/238/238547.png?modified=1622132425",
    "https://addons.mozilla.org/user-media/previews/full/238/238549.png?modified=1622132426",
    "https://addons.mozilla.org/user-media/previews/full/238/238552.png?modified=1622132430",
    "https://addons.mozilla.org/user-media/previews/full/230/230370.png?modified=1622132432"
  ],
  "experimental": false,
  "releaseNotes": "[logger] Preserve whitespace charactersImprove proxy-apply utility scriptletImprove abort-current-script scriptletImprove prevent-addEventListener scriptletAdd shim for piano-analytics.jsImprove trusted-click-element scriptletAdd prevent-clipboard-write scriptletImprove prevent-bab scriptlet[jsonpath] Increase RFC9535 complianceDot notation before bracket notation is not valid",
  "compatibility": {
    "android": {
      "max": "*",
      "min": "115.0"
    },
    "firefox": {
      "max": "*",
      "min": "115.0"
    }
  },
  "ratingBayesian": 4.800285167625802,
  "requiresPayment": false,
  "weeklyDownloads": 224585,
  "dataCollectionPermissions": [
    "none"
  ]
}

Code examples

Add-on Detail
zpi-sdkrecommended
// npm i zpi-sdk
import { ZpiClient } from "zpi-sdk";

const client = new ZpiClient({ apiKey: "zpi_xxxxxxxxxxxxxxxxxxxxxxxx" });

const data = await client.run("application:firefox-addons", "addon", {
  "id": "ublock-origin",
  "lang": "en-US"
});
console.log(data);
Full SDK reference →
request.sh
curl -X GET "https://api.zpi.web.id/v1/application:firefox-addons/addon?id=ublock-origin&lang=en-US" \
  -H "x-api-key: zpi_xxxxxxxxxxxxxxxxxxxxxxxx"

Full reference

5 endpoints · plain text
GETAdd-on Detail/v1/application:firefox-addons/addonOne add-on's registry record — daily users, weekly downloads, ratings, licence, the signed file behind the current version with its hash, and every permission it requests.

Parameters

idstringrequired
Add-on slug, numeric id, or GUID
langstringoptional
Locale for names and descriptions. Falls back to the add-on's own default. Default en-US.

Request

curl -X GET "https://api.zpi.web.id/v1/application:firefox-addons/addon?id=ublock-origin&lang=en-US" \
  -H "x-api-key: zpi_xxxxxxxxxxxxxxxxxxxxxxxx"

Example response

{
  "id": "ublock-origin",
  "url": "https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/",
  "file": {
    "url": "https://addons.mozilla.org/firefox/downloads/file/4940584/ublock_origin-1.73.0.xpi",
    "hash": "sha256:bccc51a773150af4af6e1fd62c7bfdeb7238b79ff2381b998fa9f2e38f64786a",
    "size": 4679419,
    "status": "public",
    "created": "2026-08-05T16:30:02Z",
    "mozillaSigned": false
  },
  "free": true,
  "guid": "[email protected]",
  "icon": "https://addons.mozilla.org/user-media/addon_icons/607/607454-128.png?modified=mcrushed",
  "name": "uBlock Origin",
  "tags": [
    "ad blocker",
    "anti malware",
    "anti tracker",
    "content blocker",
    "privacy",
    "security"
  ],
  "type": "extension",
  "price": 0,
  "rating": 4.8006,
  "source": "firefox-addons",
  "status": "public",
  "addonId": 607454,
  "authors": [
    {
      "url": "https://addons.mozilla.org/en-US/firefox/user/11423598/",
      "name": "Raymond Hill",
      "username": "gorhill",
      "developerId": "11423598"
    }
  ],
  "created": "2015-04-25T07:26:22Z",
  "license": {
    "url": "https://spdx.org/licenses/GPL-3.0-only.html",
    "name": "GNU General Public License v3.0 only",
    "slug": "GPL-3.0-only",
    "custom": false
  },
  "summary": "Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.",
  "updated": "2026-08-13T21:21:19Z",
  "version": "1.73.0",
  "category": "privacy-security",
  "homepage": "https://github.com/gorhill/uBlock#ublock-origin",
  "promoted": [
    "recommended"
  ],
  "developer": {
    "url": "https://addons.mozilla.org/en-US/firefox/user/11423598/",
    "name": "Raymond Hill",
    "username": "gorhill",
    "developerId": "11423598"
  },
  "categories": [
    "privacy-security"
  ],
  "dailyUsers": 10431348,
  "supportUrl": "https://old.reddit.com/r/uBlockOrigin/",
  "description": "uBlock Origin is not an \"ad blocker\", it's a wide-spectrum content blocker with CPU and memory efficiency as a primary feature.\n\nOut of the box, uBO blocks ads, trackers, coin miners, popups, etc. through the following lists of filters, enabled by default:\nEasyList (ads)EasyPrivacy (tracking)Peter Lowe’s Ad server list (ads and tracking)Online Malicious URL BlocklistuBO's own lists\nMore lists are available for you to select if you wish:\nEasyList CookieFanboy AnnoyancesAdGuard AnnoyancesDan Pollock’s hosts fileAnd many others\nAdditionally, you can point-and-click to block JavaScript locally or globally, create your own global or local rules to override entries from filter lists, and many more advanced features.\n\nFree.\nOpen source with public license (GPLv3)\nFor users by users.\n\nIf ever you really do want to contribute something, think about the people working hard to maintain the filter lists you are using, which were made available to use by all for free.\n\nDocumentationRelease notesCommunity support @ RedditContributors @ GitHubContributors @ Crowdin",
  "permissions": [
    "alarms",
    "dns",
    "menus",
    "privacy",
    "storage",
    "tabs",
    "unlimitedStorage",
    "webNavigation"
  ],
  "ratingCount": 22008,
  "reviewCount": 5805,
  "screenshots": [
    "https://addons.mozilla.org/user-media/previews/full/238/238546.png?modified=1622132421",
    "https://addons.mozilla.org/user-media/previews/full/238/238548.png?modified=1622132423",
    "https://addons.mozilla.org/user-media/previews/full/238/238547.png?modified=1622132425",
    "https://addons.mozilla.org/user-media/previews/full/238/238549.png?modified=1622132426",
    "https://addons.mozilla.org/user-media/previews/full/238/238552.png?modified=1622132430",
    "https://addons.mozilla.org/user-media/previews/full/230/230370.png?modified=1622132432"
  ],
  "experimental": false,
  "releaseNotes": "[logger] Preserve whitespace charactersImprove proxy-apply utility scriptletImprove abort-current-script scriptletImprove prevent-addEventListener scriptletAdd shim for piano-analytics.jsImprove trusted-click-element scriptletAdd prevent-clipboard-write scriptletImprove prevent-bab scriptlet[jsonpath] Increase RFC9535 complianceDot notation before bracket notation is not valid",
  "compatibility": {
    "android": {
      "max": "*",
      "min": "115.0"
    },
    "firefox": {
      "max": "*",
      "min": "115.0"
    }
  },
  "ratingBayesian": 4.800285167625802,
  "requiresPayment": false,
  "weeklyDownloads": 224585,
  "dataCollectionPermissions": [
    "none"
  ]
}
GETAdd-on Search/v1/application:firefox-addons/searchSearch the registry, sortable by users, rating, downloads, or recency.

Parameters

querystringrequired
Search keyword
appenumoptional
Which application the add-on targets. Default firefox. Values: firefox, android.
typeenumoptional
Add-on type. Values: extension, theme, dictionary, language, statictheme.
sortenumoptional
Result order. Default relevance. Values: relevance, users, rating, created, updated, downloads, hotness, random.
langstringoptional
Locale for names and descriptions. Falls back to the add-on's own default. Default en-US.
pagenumberoptional
Result page. Default 1.
countnumberoptional
Items per page. Default 25, max 50.

Request

curl -X GET "https://api.zpi.web.id/v1/application:firefox-addons/search?query=adblock&app=firefox&type=extension&sort=users&lang=en-US&page=1&count=25" \
  -H "x-api-key: zpi_xxxxxxxxxxxxxxxxxxxxxxxx"

Example response

{
  "page": 1,
  "count": 10,
  "items": [
    {
      "id": "ublock-origin",
      "url": "https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/",
      "file": {
        "url": "https://addons.mozilla.org/firefox/downloads/file/4940584/ublock_origin-1.73.0.xpi",
        "hash": "sha256:bccc51a773150af4af6e1fd62c7bfdeb7238b79ff2381b998fa9f2e38f64786a",
        "size": 4679419,
        "status": "public",
        "created": "2026-08-05T16:30:02Z",
        "mozillaSigned": false
      },
      "free": true,
      "guid": "[email protected]",
      "icon": "https://addons.mozilla.org/user-media/addon_icons/607/607454-128.png?modified=mcrushed",
      "name": "uBlock Origin",
      "tags": [
        "ad blocker"
      ],
      "type": "extension",
      "price": 0,
      "rating": 4.8006,
      "source": "firefox-addons",
      "status": "public",
      "addonId": 607454,
      "authors": [
        {
          "url": "https://addons.mozilla.org/en-US/firefox/user/11423598/",
          "name": "Raymond Hill",
          "username": "gorhill",
          "developerId": "11423598"
        }
      ],
      "created": "2015-04-25T07:26:22Z",
      "license": {
        "url": "https://spdx.org/licenses/GPL-3.0-only.html",
        "name": "GNU General Public License v3.0 only",
        "slug": "GPL-3.0-only",
        "custom": false
      },
      "summary": "Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.",
      "updated": "2026-08-13T21:21:19Z",
      "version": "1.73.0",
      "category": "privacy-security",
      "homepage": "https://github.com/gorhill/uBlock#ublock-origin",
      "promoted": [
        "recommended"
      ],
      "developer": {
        "url": "https://addons.mozilla.org/en-US/firefox/user/11423598/",
        "name": "Raymond Hill",
        "username": "gorhill",
        "developerId": "11423598"
      },
      "categories": [
        "privacy-security"
      ],
      "dailyUsers": 10431348,
      "supportUrl": "https://old.reddit.com/r/uBlockOrigin/",
      "description": "uBlock Origin is not an \"ad blocker\", it's a wide-spectrum content blocker with CPU and memory efficiency as a primary feature.\n\nOut of the box, uBO blocks ads, trackers, coin mine…",
      "permissions": [
        "alarms"
      ],
      "ratingCount": 22008,
      "reviewCount": 5805,
      "screenshots": [
        "https://addons.mozilla.org/user-media/previews/full/238/238546.png?modified=1622132421"
      ],
      "experimental": false,
      "releaseNotes": "[logger] Preserve whitespace charactersImprove proxy-apply utility scriptletImprove abort-current-script scriptletImprove prevent-addEventListener scriptletAdd shim for piano-analy…",
      "compatibility": {
        "android": {
          "max": "*",
          "min": "115.0"
        },
        "firefox": {
          "max": "*",
          "min": "115.0"
        }
      },
      "ratingBayesian": 4.800285153320923,
      "requiresPayment": false,
      "weeklyDownloads": 224585,
      "dataCollectionPermissions": [
        "none"
      ]
    }
  ],
  "query": "adblock",
  "total": 2309,
  "source": "firefox-addons",
  "hasMore": true,
  "nextPage": 2
}
GETAdd-on Versions/v1/application:firefox-addons/versionsEvery published version, newest first, each with its signed file, hash, permissions and browser compatibility range.

Parameters

idstringrequired
Add-on slug, numeric id, or GUID
langstringoptional
Locale for names and descriptions. Falls back to the add-on's own default. Default en-US.
pagenumberoptional
Result page. Default 1.
countnumberoptional
Versions per page. Default 25, max 50.

Request

curl -X GET "https://api.zpi.web.id/v1/application:firefox-addons/versions?id=ublock-origin&lang=en-US&page=1&count=25" \
  -H "x-api-key: zpi_xxxxxxxxxxxxxxxxxxxxxxxx"

Example response

{
  "id": "ublock-origin",
  "page": 1,
  "count": 8,
  "items": [
    {
      "url": "https://addons.mozilla.org/firefox/downloads/file/4940584/ublock_origin-1.73.0.xpi",
      "hash": "sha256:bccc51a773150af4af6e1fd62c7bfdeb7238b79ff2381b998fa9f2e38f64786a",
      "size": 4679419,
      "status": "public",
      "license": {
        "url": "https://spdx.org/licenses/GPL-3.0-only.html",
        "name": "GNU General Public License v3.0 only",
        "slug": "GPL-3.0-only"
      },
      "version": "1.73.0",
      "released": "2026-08-05T16:30:02Z",
      "reviewed": "2026-08-05T16:31:32Z",
      "versionId": 6396396,
      "permissions": [
        "alarms",
        "dns",
        "menus"
      ],
      "releaseNotes": "[logger] Preserve whitespace charactersImprove proxy-apply utility scriptletImprove abort-current-script scriptletImprove prevent-addEventListener scriptletAdd shim for piano-analy…",
      "compatibility": {
        "android": {
          "max": "*",
          "min": "115.0"
        },
        "firefox": {
          "max": "*",
          "min": "115.0"
        }
      },
      "mozillaSigned": false
    },
    {
      "url": "https://addons.mozilla.org/firefox/downloads/file/4888680/ublock_origin-1.72.2.xpi",
      "hash": "sha256:40c315b0da7871868155ecfae7a50a58dfa0920aebd865e008214986f1b7c578",
      "size": 4585322,
      "status": "public",
      "license": {
        "url": "https://spdx.org/licenses/GPL-3.0-only.html",
        "name": "GNU General Public License v3.0 only",
        "slug": "GPL-3.0-only"
      },
      "version": "1.72.2",
      "released": "2026-07-08T12:43:50Z",
      "reviewed": "2026-07-08T12:46:18Z",
      "versionId": 6344484,
      "permissions": [
        "alarms",
        "dns",
        "menus"
      ],
      "releaseNotes": "Add missing test against null object",
      "compatibility": {
        "android": {
          "max": "*",
          "min": "115.0"
        },
        "firefox": {
          "max": "*",
          "min": "115.0"
        }
      },
      "mozillaSigned": false
    },
    {
      "url": "https://addons.mozilla.org/firefox/downloads/file/4872816/ublock_origin-1.72.0.xpi",
      "hash": "sha256:79cd426ab599801c59dfe9895cb4b8002faf3da059f7111c2721ac10168a3b64",
      "size": 4623228,
      "status": "public",
      "license": {
        "url": "https://spdx.org/licenses/GPL-3.0-only.html",
        "name": "GNU General Public License v3.0 only",
        "slug": "GPL-3.0-only"
      },
      "version": "1.72.0",
      "released": "2026-06-28T20:02:55Z",
      "reviewed": "2026-07-02T10:20:34Z",
      "versionId": 6328616,
      "permissions": [
        "alarms",
        "dns",
        "menus"
      ],
      "releaseNotes": "Fix broken rendering of final URL in strict-block pageFix potential exception in set-attribute scriptletImprove parsing/interpretation of consecutive $$ in network filtersImprove g…",
      "compatibility": {
        "android": {
          "max": "*",
          "min": "115.0"
        },
        "firefox": {
          "max": "*",
          "min": "115.0"
        }
      },
      "mozillaSigned": false
    }
  ],
  "total": 149,
  "source": "firefox-addons",
  "hasMore": true,
  "nextPage": 2
}
GETAdd-on Reviews/v1/application:firefox-addons/reviewsUser ratings and written reviews, with the developer's replies. Filterable to a single star rating.

Parameters

idstringrequired
Add-on slug, numeric id, or GUID
scorenumberoptional
Only reviews with this star rating.
langstringoptional
Locale for names and descriptions. Falls back to the add-on's own default. Default en-US.
pagenumberoptional
Result page. Default 1.
countnumberoptional
Reviews per page. Default 25, max 50.

Request

curl -X GET "https://api.zpi.web.id/v1/application:firefox-addons/reviews?id=ublock-origin&score=1&lang=en-US&page=1&count=25" \
  -H "x-api-key: zpi_xxxxxxxxxxxxxxxxxxxxxxxx"

Example response

{
  "id": "ublock-origin",
  "page": 1,
  "count": 10,
  "items": [
    {
      "id": "2737734",
      "author": "GeepCheep",
      "rating": 5,
      "created": "2026-08-18T00:38:57Z",
      "version": "1.73.0",
      "authorId": "19708719",
      "authorUrl": "https://addons.mozilla.org/en-US/firefox/user/19708719/"
    },
    {
      "id": "2737509",
      "author": "Firefox user 20090033",
      "rating": 5,
      "created": "2026-08-17T01:19:17Z",
      "version": "1.73.0",
      "authorId": "20090033",
      "authorUrl": "https://addons.mozilla.org/en-US/firefox/user/20090033/"
    },
    {
      "id": "2737507",
      "author": "Firefox user 20103681",
      "rating": 5,
      "created": "2026-08-17T01:06:48Z",
      "version": "1.73.0",
      "authorId": "20103681",
      "authorUrl": "https://addons.mozilla.org/en-US/firefox/user/20103681/"
    },
    {
      "id": "2737485",
      "text": "perfect in every minute detail",
      "author": "Samuel de Oliveira Rogerio",
      "rating": 5,
      "created": "2026-08-16T23:07:47Z",
      "version": "1.73.0",
      "authorId": "17101971",
      "authorUrl": "https://addons.mozilla.org/en-US/firefox/user/17101971/"
    },
    {
      "id": "2737467",
      "author": "NascarJoe24",
      "rating": 5,
      "created": "2026-08-16T21:13:57Z",
      "version": "1.73.0",
      "authorId": "20103429",
      "authorUrl": "https://addons.mozilla.org/en-US/firefox/user/20103429/"
    },
    {
      "id": "2737410",
      "author": "Bill",
      "rating": 5,
      "created": "2026-08-16T16:24:52Z",
      "version": "1.73.0",
      "authorId": "20102985",
      "authorUrl": "https://addons.mozilla.org/en-US/firefox/user/20102985/"
    },
    {
      "id": "2737349",
      "author": "Helion",
      "rating": 5,
      "created": "2026-08-16T10:19:07Z",
      "version": "1.73.0",
      "authorId": "20102317",
      "authorUrl": "https://addons.mozilla.org/en-US/firefox/user/20102317/"
    },
    {
      "id": "2737269",
      "author": "Fragrant_Tadpole_265",
      "rating": 5,
      "created": "2026-08-16T01:13:28Z",
      "version": "1.73.0",
      "authorId": "20101663",
      "authorUrl": "https://addons.mozilla.org/en-US/firefox/user/20101663/"
    }
  ],
  "score": null,
  "total": 22008,
  "source": "firefox-addons",
  "hasMore": true,
  "nextPage": 2
}
GETAuthor Profile/v1/application:firefox-addons/authorAn add-on author's public profile and their average rating across everything they publish.

Parameters

developerstringrequired
Author username or numeric id
langstringoptional
Locale for names and descriptions. Falls back to the add-on's own default. Default en-US.

Request

curl -X GET "https://api.zpi.web.id/v1/application:firefox-addons/author?developer=gorhill&lang=en-US" \
  -H "x-api-key: zpi_xxxxxxxxxxxxxxxxxxxxxxxx"

Example response

{
  "url": "https://addons.mozilla.org/en-US/firefox/user/11423598/",
  "name": "Raymond Hill",
  "source": "firefox-addons",
  "created": "2015-01-25T07:49:39Z",
  "homepage": "https://github.com/gorhill",
  "username": "gorhill",
  "addonCount": 4,
  "developerId": "11423598",
  "averageRating": 4.8
}

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