Cat Gatekeeper by ZOKUZOKU
Spending too much time on social media? A cat hijacks your screen. The cutest forced-break app.
1,506 Users1,506 Users
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About this extension
Please be careful of apps and websites with names similar to Cat Gatekeeper.
The official version can be installed from this page, or from the store link on the official website.
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■ Main Changes in ver.1.3.2
- Swapped one of the cats for a new one.
- Added 16 languages, on top of Japanese and English.
- Added a settings panel behind the gear icon at the top right of the menu, where you can see the cats that appear.
- A quick guide now opens right after you install the extension.
*After the extension updates itself, tracking may not be reflected on pages that were already open.
Please reload the page if this happens.
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Social media is just too hard to stop checking, isn't it? 💦🥵
What you need isn't more willpower — it's a cat that forces its way onto your screen!!
You know that cat who always shows up right when you're trying to work? 🐈
I've recreated that classic cat-owner experience in your browser.
Oh well, they're too cute to stay mad at…
Let's face it — humans are just servants to their cats.
We are powerless against their charm.
The supreme beings! The ultimate fluffballs!
Let their adorableness heal you while you take a proper break.
■ Who this is for
* The scrolling won't stop
* You suddenly realize an hour has passed
* Willpower alone just isn't cutting it
■ How to use
1. Click the puzzle piece icon next to the address bar in the top-right corner of your browser, then select Cat Gatekeeper to open the menu.
2. Set your usage limit (default: 10 min)
3. Set your break time (default: 5 min)
4. Set your favorite sites (default: major social media sites)
5. When time's up, a cat appears
6. Rest until the countdown ends
The time and target sites come preset, and you can change them freely from the menu.
To make the cat leave, press and hold the button below it, or use the menu.
■ How Time Tracking Works
Time is measured only while you are actually viewing the designated sites.
Even if you open the same site in multiple tabs, they are counted as a single combined time.
If you switch tabs or apps, tracking resumes from where you left off if you return within 30 minutes.
If you do not view the site for 30 minutes or more, the browsing time resets.
Once a break ends, the counter starts over from 0.
You can check your current tracked time from the menu.
*YouTube and YouTube Shorts are counted separately.
■ Supported Sites
Major social media platforms are registered by default.
You can toggle them on or off using the checkboxes.
Additionally, you can add or change target sites from the menu screen.
■ Privacy
* Page access permission is used solely to display the break overlay (cat overlay).
* No data is collected or transmitted externally.
■ Source code
So you can use the extension with confidence, the source code is published for viewing, and you can check exactly what it does.
https://github.com/zokuzoku/cat-gatekeeper-source
*Copying, modifying, or redistributing the source code, videos, images, or icons is prohibited.
■ Free, no ads, available in 18 languages
★ The desktop app is here too!
It works beyond the browser, across your whole computer.
Cats show up on top of any app.
https://zokuzoku.github.io/cat-gatekeeper/desktop/
The official version can be installed from this page, or from the store link on the official website.
ーーーーーーーーーーーーーーーーーーー
■ Main Changes in ver.1.3.2
- Swapped one of the cats for a new one.
- Added 16 languages, on top of Japanese and English.
- Added a settings panel behind the gear icon at the top right of the menu, where you can see the cats that appear.
- A quick guide now opens right after you install the extension.
*After the extension updates itself, tracking may not be reflected on pages that were already open.
Please reload the page if this happens.
ーーーーーーーーーーーーーーーーーーー
Social media is just too hard to stop checking, isn't it? 💦🥵
What you need isn't more willpower — it's a cat that forces its way onto your screen!!
You know that cat who always shows up right when you're trying to work? 🐈
I've recreated that classic cat-owner experience in your browser.
Oh well, they're too cute to stay mad at…
Let's face it — humans are just servants to their cats.
We are powerless against their charm.
The supreme beings! The ultimate fluffballs!
Let their adorableness heal you while you take a proper break.
■ Who this is for
* The scrolling won't stop
* You suddenly realize an hour has passed
* Willpower alone just isn't cutting it
■ How to use
1. Click the puzzle piece icon next to the address bar in the top-right corner of your browser, then select Cat Gatekeeper to open the menu.
2. Set your usage limit (default: 10 min)
3. Set your break time (default: 5 min)
4. Set your favorite sites (default: major social media sites)
5. When time's up, a cat appears
6. Rest until the countdown ends
The time and target sites come preset, and you can change them freely from the menu.
To make the cat leave, press and hold the button below it, or use the menu.
■ How Time Tracking Works
Time is measured only while you are actually viewing the designated sites.
Even if you open the same site in multiple tabs, they are counted as a single combined time.
If you switch tabs or apps, tracking resumes from where you left off if you return within 30 minutes.
If you do not view the site for 30 minutes or more, the browsing time resets.
Once a break ends, the counter starts over from 0.
You can check your current tracked time from the menu.
*YouTube and YouTube Shorts are counted separately.
■ Supported Sites
Major social media platforms are registered by default.
You can toggle them on or off using the checkboxes.
Additionally, you can add or change target sites from the menu screen.
■ Privacy
* Page access permission is used solely to display the break overlay (cat overlay).
* No data is collected or transmitted externally.
■ Source code
So you can use the extension with confidence, the source code is published for viewing, and you can check exactly what it does.
https://github.com/zokuzoku/cat-gatekeeper-source
*Copying, modifying, or redistributing the source code, videos, images, or icons is prohibited.
■ Free, no ads, available in 18 languages
★ The desktop app is here too!
It works beyond the browser, across your whole computer.
Cats show up on top of any app.
https://zokuzoku.github.io/cat-gatekeeper/desktop/
Rated 4.8 by 12 reviewers
Permissions and data
Required permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.3.2
- Size
- 38.32 MB
- Last updated
- 14 hours ago (Sep 21, 2026)
- Related Categories
- License
- MIT License
- Version History
- Tags
- Add to collection
The developer of this extension asks that you help support its continued development by making a small contribution.