addons.mozilla.org

Firefox add-on statistics

Rankings, theme and extension categories, permissions and keyword difficulty for every public Firefox add-on.

  • Extensions 79.7K +3.8K in 30 days
  • Themes 69.2K −3.3K in 30 days
  • Users across all listings 120.9M
  • New in the last 30 days 3.3K

Data as of November 8, 2026

Store overview stats

Most popular extensions

Ranked by users, without language packs

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  1. 1 uBlock Origin Raymond Hill 11.6M users
  2. 2 Clipboard WatchDog Sumalya Chatterjee 3M users
  3. 3 Adblock Plus Adblock Plus 2.9M users
  4. 4 Privacy Badger EFF Technologists 2M users
  5. 5 Video Download Helper vdh 1.9M users
  6. 6 AdGuard AdBlocker Adguard Software Ltd 1.9M users
  7. 7 AdBlock for Firefox AdBlock 1.4M users
  8. 8 Dark Reader Dark Reader Ltd 1.4M users
  9. 9 Easy Screenshot Firefox 1.4M users
  10. 10 DuckDuckGo Search & Tracker Protection DuckDuckGo 1.1M users

Biggest 7-day gain among add-ons with 1,000+ users

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  1. 1 AnyDownload devofthedark +193% +2.2K users
  2. 2 Windows Live Moonlight Bruno Diaz +119% +1.4K users
  3. 3 Topo! Black (1.0 First Release) hakuneslop +107% +2.4K users
  4. 4 Pix Companion Groupement d’intérêt public « Pix » +104% +25.7K users
  5. 5 Claude in Sidebar Picos +45% +1.5K users
  6. 6 Quick Heal Web Protection Quick Heal Technologies +45% +2.5K users
  7. 7 Terminal Deluxe Big Ben +33% +1.5K users
  8. 8 Pearltrees Pearltrees +29% +1.7K users
  9. 9 Neapolitan Ice Cream Alfredo +26% +1.3K users
  10. 10 Control Panel for YouTube Jonny Buchanan +22% +13.2K users

Recently removed

Most-used listings gone from the store in the last 7 days

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  1. 1 Cookie Editor Removed Nov 3 1.6K users
  2. 2 VPN Removed Nov 3 1.4K users
  3. 3 PocketUniverse Removed Nov 2 889 users
  4. 4 Qsirch Helper Removed Nov 2 888 users
  5. 5 1080p on Twitch Ytmonster.ru Removed Nov 3 513 users
  6. 6 Speechify — Text to Speech Removed Nov 3 226 users
  7. 7 AutoTube Removed Nov 2 194 users
  8. 8 Cyberpunk_2077 Removed Oct 31 160 users
  9. 9 Wistia Video Downloader Plus Removed Nov 4 132 users
  10. 10 Claude Counter Removed Nov 1 123 users

Most popular themes

69,160 themes, 46% of all Firefox listings

Activist – Balanced
Firefox
329K 4.63 (156)
Ash
Firefox
319K 1.82 (39)
Visionary – Balanced
Firefox
206K 4.46 (68)
Dreamer – Balanced
Firefox
176K 4.73 (64)
Lagoon
Firefox
148K 3.40 (5)
Sun
Firefox
117K 3.60 (5)
Pine
Firefox
112K 3.57 (7)
Expressionist – Balanced
Firefox
108K 4.72 (25)
Dark space - The best dynamic theme
Nicothin
100K 4.86 (2,081)
Blue
Firefox
96K 4.45 (11)
Lush – Soft
Firefox
93K 4.59 (41)
Flare
Firefox
90K 3.67 (3)
Innovator – Balanced
Firefox
90K 4.54 (24)
Playmaker – Balanced
Firefox
86K 3.75 (12)
Lavender
Firefox
79K 3.00 (2)
Tide
Firefox
72K 3.60 (5)

Manifest V2 lives on

Extensions by manifest version, themes excluded

Mozilla kept Manifest V2 support, including blocking webRequest, after Chrome dropped it. 64% of Firefox extensions still use V2.

Most requested permissions

Share of extensions asking for each

All permissions

Categories

Firefox sorts themes and extensions into separate categories.

Biggest categories

Share of all listings in the store

Keyword difficulty in Firefox Add-ons

Difficulty, 1–99, is how hard it is to reach the top 10 of this store's search for a term. 1,099 tracked keywords have a score here.

All keywords

Open here, crowded elsewhere

Hard to rank for on the other stores, but this store's top results are still small.

  1. google chrome vs 75 9
  2. ia vs 68 2
  3. chatgpt vs 75 10
  4. microsoft vs 76 13
  5. minecrosoft vs 71 8
  6. pdf vs 72 9
  7. song vs 68 8
  8. chrome vs 75 16
  9. application vs 66 9
  10. amazon vs 65 9
  11. document vs 64 8
  12. ai vs 71 16

Most competitive

Highest difficulty: the top results are already popular.

  1. language 90
  2. ad blocker 77
  3. unblock 74
  4. block ads 74
  5. ad-blocking 73
  6. website blocker 73
  7. ad 71
  8. block 70
  9. blog 70
  10. writer's block 69
  11. ads 68
  12. lead 68

Go deeper into Firefox Add-ons