> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.jomo.so/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# [Mac App] How to block websites on Firefox using Jomo Mac?

Firefox is not compatible with the blocking technology used in the Mac version of Jomo by default, so these two steps are necessary to enable it.
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## ⚙️ Installation steps

1. [Open the link on your Mac](jomo://copyFirefoxNativeManifest). A panel will open. Then, click ${color}[#0061ff](**Save.**)
![](https://storage.crisp.chat/users/helpdesk/website/3219039fc179d800/itd-45_1qqwwco.png)
2. [Install the Jomo companion extension for Firefox.](https://addons.mozilla.org/en-US/firefox/addon/jomo-companion/)
![](https://storage.crisp.chat/users/helpdesk/website/3219039fc179d800/itd-47_1awd2jh.png)
3. Make sure the following permissions are enabled for the companion extension: “Access your data for all websites,” “Run in Private Windows,” and “Run on sites with restrictions.”
4. Quit and reopen Firefox.

That’s it! **The websites you’ve blocked in Jomo Mac will now be blocked on Firefox**.
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## 🛠️ Not working?

**Try these steps** if websites aren’t blocked on Firefox. If they don’t work, contact us for help.

* Restart Firefox.
* In Firefox, go to `about:addons`. From the side panel, click ${color}[#0061ff](**Extensions**) and select ${color}[#0061ff](**Jomo Companion**) from the list. Verify that all permissions are granted for Jomo.
* Verify that a file named `com.jomo.Jomo.json` is present in `/Users/{your_user_name}/Library/Application Support/Mozilla/NativeMessagingHosts/`. It is very important that the file is located in the `NativeMessagingHosts` folder. If this folder does not exist, create it manually and copy the file there.
* Ensure you are using the latest version of Jomo for Mac, available on the Mac App Store.
* Restart your Mac.