CatBlock

CatBlock is an ad-blocking extension, which replaces ads with cute pictures of cats (or whatever you want)!

CatBlock: Firefox Add-On

CatBlock is an ad-blocking extension for Firefox. It replaces ads with cute pictures of cats or any other images of your choice. Originally developed by AdBlock team in 2014, it was open-sourced and continued by Kieran and Tomáš. Get more information about its development and history on GitHub.
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View on Firefox Browser Add-ons

Add-on stats

Users: 145
-6
Rating: 4.62
(13)
Version: 1.4.10resigned1 (Last updated: 2024-04-25)
Creation date: 2016-05-18
Weekly download count: 2
Firefox on Android: Yes
Risk impact: Very high risk impact
Risk likelihood:
Moderate risk likelihood
Manifest version: 2
Permissions:
  • http://*/*
  • https://*/*
  • contextMenus
  • tabs
  • idle
  • webRequest
  • webRequestBlocking
  • webNavigation
  • alarms
  • storage
    • See more
Size: 1.16M
URLs: Website

Ranking

# 8,395 ▼ 100
Other rankings
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Other platforms

CatBlock (v1.5.1.1)
4.57 (54) 4,000
Not available on Android
Not available on Edge
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Add-on summary

Analyze keywords

In October 2014, when the original CatBlock extension was officially discontinued by Michael at AdBlock, and open-sourced under the GPLv3 license by AdBlock Team, Kieran and Tomáš (at that time members of AdBlock Team), decided to keep CatBlock alive independently.

Kieran & Tomáš left the AdBlock team in early 2016 to put more effort into development of CatBlock, including creating versions compatible with both Mozilla Firefox and Microsoft Edge.

For more information about the development & history, please check out https://github.com/CatBlock/catblock

User reviews

by DeAndre Queary, 2024-07-11
by DeAndre Queary, 2024-07-11
Love seeing the cats instead of annoying ads!
by JacquelynSapphire, 2023-08-05
View all user reviews

Add-on safety

Risk impact

CatBlock requires a lot of sensitive permissions. Exercise caution before installing.

Risk likelihood

CatBlock is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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