TiedSiren by TiedSiren
Block the sites you decided to block. Every subdomain, every open tab. No account, nothing leaves your machine.
Available on Firefox for Android™Available on Firefox for Android™
Scan the QR code to open this extension in Firefox for Android
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About this extension
You already know which sites eat your day. TiedSiren stops them loading.
Add a domain. It stops working in Firefox, along with every subdomain. Turn the switch off when you want it back. That is the whole product.
<strong>What it does</strong>
<ul><li>Blocks a domain and all of its subdomains. m.facebook.com goes when facebook.com goes.</li><li>Catches the tabs you already have open. You do not have to reload anything.</li><li>Shows you a plain page instead of the site, with no counter, no streak and no reward.</li><li>Works in Firefox 140 and later, on desktop.</li></ul>
<strong>What it does not do</strong>
<ul><li>No account. No sign up. Nothing leaves your machine.</li><li>No timer, no pomodoro, no usage charts. Other extensions do that well.</li><li>No pause button and no five second bypass.</li></ul>
<strong>Being honest about the limit</strong>
An extension can be switched off in two clicks, and this one says so in its own popup. If you want a block that holds when you fight it, that takes an application outside the browser. TiedSiren for Android exists today, and the desktop application is being built. This extension is the browser half.
<strong>Privacy</strong>
Your blocklist stays in your browser storage. The extension has no server, no analytics and no account. It never reads the content of the pages you visit.
Add a domain. It stops working in Firefox, along with every subdomain. Turn the switch off when you want it back. That is the whole product.
<strong>What it does</strong>
<ul><li>Blocks a domain and all of its subdomains. m.facebook.com goes when facebook.com goes.</li><li>Catches the tabs you already have open. You do not have to reload anything.</li><li>Shows you a plain page instead of the site, with no counter, no streak and no reward.</li><li>Works in Firefox 140 and later, on desktop.</li></ul>
<strong>What it does not do</strong>
<ul><li>No account. No sign up. Nothing leaves your machine.</li><li>No timer, no pomodoro, no usage charts. Other extensions do that well.</li><li>No pause button and no five second bypass.</li></ul>
<strong>Being honest about the limit</strong>
An extension can be switched off in two clicks, and this one says so in its own popup. If you want a block that holds when you fight it, that takes an application outside the browser. TiedSiren for Android exists today, and the desktop application is being built. This extension is the browser half.
<strong>Privacy</strong>
Your blocklist stays in your browser storage. The extension has no server, no analytics and no account. It never reads the content of the pages you visit.
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Permissions and data
Required permissions:
- Block content on any page
- Access browser tabs
- Access browser activity during navigation
Optional 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
- 0.2.0
- Size
- 697.44 KB
- Last updated
- 5 days ago (Nov 8, 2026)
- Related Categories
- License
- All Rights Reserved
- Version History
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