How to Block Gambling Sites on Chrome, Edge and Firefox

To block gambling sites in your own browser, use a blocking extension or a tool that works across the computer. Set it up in Chrome, and in Edge and Firefox too if you use them, allow it in private windows, and decide before you start who should be able to turn it off later.

Does Chrome have a built-in way to block gambling sites?

Not for an ordinary personal account. Chrome's site settings let you change what a site may do, such as use your camera or show pop-ups. Google's help describes two lists that block sites, and neither is a setting on an ordinary personal account. Family Link lets a parent, who must be 18 or older, allow or block specific sites in Chrome for a child's Google Account. An administrator's URL blocking applies to managed Chrome browsers, and Google calls it “basic URL management.”

SafeSearch is not a site block either: Google says it “only works on Google Search” and “doesn't affect content on other search engines or websites.”

Edge and Firefox have administrator block lists too: Microsoft documents a site block list policy for Edge, and Mozilla documents one in its Firefox administrator reference. These lists are designed for browsers an organization manages. Google describes a managed browser as one “set up and maintained by a school, company, or other group,” and says Chrome's menu shows “Managed by your organization” when it is. Setting one up is administrator work, not an ordinary browser setting.

For your own browser, that leaves two kinds of tool: a blocking extension that you add to each browser, or a tool that works across the computer.

Your options at a glance

How to block gambling sites in Chrome with an extension

To set up a blocking extension in Chrome:

• Open the extension's Chrome Web Store page, select Add to Chrome, and approve it. Google's extension help describes these steps and says to approve only extensions you trust.
• Open the extension's options and add the gambling sites you want blocked.
• If it has a password or lock, set it, and decide who will hold the password.
• Allow it in Incognito, as the private-windows section below explains.
• Repeat the setup in each Chrome profile you use.

LeechBlock NG and BlockSite are general-purpose blocking extensions with Chrome, Edge and Firefox listings. Their entries use the same fields, and neither is recommended over the other.

LeechBlock NG

• Publisher: James Anderson, named as the developer on its store listings.
• Where to get it: the Chrome Web Store, Edge Add-ons or Firefox Add-ons.
• Cost: free. Its Chrome listing calls it a “simple free productivity tool.”
• What it blocks: the sites you specify, in up to 30 sets, each with its own times and days.
• Lock: a password or random access code for its options page, which its listing says is “to slow you down in moments of weakness!” A Lockdown feature blocks sites immediately for a set time.
• Privacy section: its Chrome listing says “The developer has disclosed that it will not collect or use your data.”
• Check first: that you are comfortable building the list yourself. Its publisher says LeechBlock “is not designed for parental control or for blocking offensive content.”

BlockSite

• Publisher: BlockSite LP on the Chrome Web Store, and Blocksite on Edge Add-ons and Firefox Add-ons.
• Where to get it: the Chrome Web Store, Edge Add-ons or Firefox Add-ons.
• Cost: free to install, with a paid Premium subscription. Its help center says “only the Adult category is included in the free version.”
• What it blocks: a custom blocklist, on a schedule if you want one, and categories. A BlockSite blog post lists Gambling among its categories; by the help center's note, a gambling category would need Premium.
• Lock: Password Protection “allows you to lock your BlockSite settings and block lists,” and BlockSite suggests asking a trusted friend or family member to set the password for you.
• Privacy section: its Chrome listing says it handles “Web history.”
• Check first: whether the features you want are in the free version, and who will hold the password.

StayFocusd, from Sensor Tower, is a Chrome extension that limits the time you spend on sites you list; its listing describes a Nuclear Option that blocks sites for the number of hours you set.

The Chrome Web Store also lists extensions that describe themselves as gambling blockers. Before you add one, check who publishes it, when it was last updated, and what its privacy section says it collects or uses.

BetBlocker and Gamban are apps for computers and phones: BetBlocker's download options and Gamban's compatibility page list operating systems, not browser extensions. They, and GamBlock, are covered in how to block gambling sites on Windows.

Google's extension timeline says the remaining extensions built on its older Manifest V2 format were removed from the Chrome Web Store on August 31, 2026, so an extension named in an older guide may no longer be listed.

How to block gambling sites in Edge

The site block lists that Microsoft documents for Edge are the family and administrator kinds, so for your own Edge, add a blocking extension from Microsoft's Edge Add-ons store. LeechBlock NG and BlockSite both have Edge listings, linked above. Set it up the same way as in Chrome, in each Edge profile you use.

Microsoft Family Safety can block sites a family organizer lists, in a supported browser, “currently Edge,” for family members signed in to their Microsoft accounts, and Microsoft says that, for now, only the family organizer can make changes to a member's safety settings. Whether it suits an adult is covered in how to block gambling sites on Windows.

How to block gambling sites in Firefox

The site block list that Mozilla documents for Firefox is the administrator kind described above, so for your own Firefox, add a blocking extension from Firefox Add-ons. Set it up the same way, in each Firefox profile you use.

LeechBlock NG's Firefox listing shows the same version as its Chrome listing and was last updated on September 27, 2026. BlockSite's Firefox listing shows an older version than its Chrome and Edge listings and was last updated on April 25, 2024, so check what it offers in Firefox before you rely on it.

Make it work in Incognito and other private windows

An extension runs in a private window only when its private-window setting allows it. Chrome and Edge give each extension its own switch, and Mozilla says Firefox extensions don't work in private browsing by default. Make this part of setup:

• Chrome: select More, then Extensions, then Manage extensions. On the extension, select Details and turn on Allow in Incognito, as Google's help describes.
• Edge: select Extensions, then Manage extensions. Select Details under the extension, then Allow in InPrivate, as Microsoft's help describes.
• Firefox: open the extension in Firefox's Add-ons Manager and select Allow under Run in Private Windows, as Mozilla's developer documentation describes.

Chrome, Edge and Firefox on one PC

An extension works in the browser and profile where you add it. Google says Chrome profiles keep your Chrome info separate, “like bookmarks, history, passwords, and other settings.” So set up the extension in each Chrome profile you use, then in Edge and Firefox if you use them, and allow it in private windows each time.

Tools that work outside the browser are set up on the computer or network instead. Blocking software for Windows works on the computer where it is installed, within what its maker supports, and a DNS filtering service works on the devices and networks set to use it; follow the service's own setup guide. Both are compared in how to block gambling sites on Windows, and the layers a gambling blocker can work at explains how those approaches differ.

Who can turn it off later?

Decide this before you choose, because the answer differs by method:

• A blocking extension: you. If you set a lock, it covers the extension's own settings, and changing them needs the password.
• Family supervision: the parent or family organizer who manages the supervision settings.
• An administrator policy: whoever manages the browser.
• Blocking software for Windows: it depends on the program. It might be you, whoever holds a password, or a person who approves changes that would weaken the block.

Ask the person first, and agree on what they will do when you ask for a change. The four ways a gambling blocker can be locked compares lock types, and a gambling blocker where someone else holds the key covers the approval model. No method here makes a block permanent, and none guarantees an outcome.

Where GuardianBlock fits

GuardianBlock for Windows will be available soon. With it, you can add a gambling website as your own Custom Block. By default a Custom Block covers the website's registrable domain and its subdomains, and you see that scope before you confirm it. Adding a block needs no one's approval. Pausing or removing one is a keyholder-approved change: someone you trust signs in to their own account and approves or denies the request. They cannot operate your computer, see your screen, or read your browsing history.

GuardianBlock runs on an eligible personal, unmanaged Windows 11 Home or Pro x64 PC and works in Chrome, Edge and Firefox, with browser-specific private-browsing differences explained on its browser support page. That page says:

• Chrome: Guest mode is turned off. Incognito is turned off when you use a standard Windows account.
• Edge: InPrivate is turned off when you use a standard Windows account, because Edge cannot run the GuardianBlock extension in InPrivate.
• Firefox: GuardianBlock applies your policy in normal and private windows.

It does not support Windows 10, macOS, iOS, Android, Linux, ARM64, shared computers, or employer, school, domain, MDM, or IT-managed devices, and there is no phone app. It does not cover phones, other computers, or a gambling account itself, and a site block is not complete or permanent. Read the limitations before relying on it. GuardianBlock is not treatment or crisis support.

Chrome on a Mac, Chromebook or phone

Google's extension help covers adding extensions to Chrome on your desktop, and its instructions for extensions in Incognito cover Chrome browser and ChromeOS devices, so the extension steps above apply in Chrome on a Mac or a Chromebook. For a phone, use the phone's own controls; for an iPhone, see how to block gambling apps on an iPhone. GuardianBlock is for eligible Windows 11 PCs.

Quick answers

Can I block a website in Chrome without an extension? Not through an ordinary personal account's settings. Chrome's own block lists are for a supervised child's account or a browser an organization manages; outside the browser, blocking software or a DNS filtering service can do it.

Is there a free way? Yes. LeechBlock NG is free, and BlockSite is free to install; its help center says blocking categories other than Adult requires Premium.

Does a blocking extension work in Incognito? Only where it is allowed to run. Turn on Allow in Incognito in Chrome and Allow in InPrivate in Edge, and set Run in Private Windows to Allow in Firefox.

Do I need to set it up in Edge and Firefox too? Yes, if you use them. An extension works in the browser and profile where you add it.

Can I make it so I can't just switch it off? Choose a tool with a lock, and give the password, or the approval, to someone you trust. With an extension, the lock covers the extension's own settings, and BlockSite suggests a trusted friend or family member set its password. Some blocking software for Windows has a person approve changes that would weaken the block.

Can I block gambling sites without listing each one? Some tools keep a gambling category, and their reach depends on how well that list is kept up; see whether any gambling blocklist is complete. With LeechBlock NG, you list the sites yourself.

Does a blocking extension see my browsing? Check the privacy section of its store listing, which is the developer's own declaration rather than an audit. LeechBlock NG's says it will not collect or use your data, and BlockSite's says it handles web history.