The Locale Switcher extension for Chrome and Firefox changes browser language settings and Accept-Language headers, with per-tab controls.
Open source
24 alternativesPopup Blocker (strict)
Popup Blocker (strict) prevents popup windows in a browser extension and includes a history feature.
About Popup Blocker (strict)
Popup Blocker (strict) is an open-source browser extension that prevents websites from opening popup windows. Instead of closing popups after they appear, it intercepts requests for new windows and blocks them before they open. The project code is hosted on GitHub under the MPL-2.0 license, with installation links for Chrome, Edge, Firefox, Opera, and Firefox for Android.
When a site requests a popup, the extension lists each request for review. You can deny the request, allow it, open it in a background tab, or redirect the current page to the popup URL. Repeated requests to the same address are grouped with a badge number showing the total count. It handles requests from window.open, links with target=_blank, and form submissions, and can preview popup links in a notification box.
It suits users who want manual control over popups and access to a request history. The repository also links to a FAQs page and a test page for checking blocking behavior.
Key features
- Blocks popup requests before windows open
- Lists blocked requests for review
- Allow or deny each popup request
- Open blocked popup in background tab
- Redirect current page to popup URL
- Shows badge count for repeated requests
Best for: People who want strict, manual control over popup windows in their browser.
Good for
- Open-source code under MPL-2.0 license
- Available for Chrome, Edge, Firefox, Opera and Firefox for Android
- Lists requests with history for review
- Supports window.open, target=_blank and form submissions
Watch out for
- Requires manual review of each blocked request
Popup Blocker (strict) at a glance
- Category
- Privacy & Security › Ad & Tracker Blockers
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Android, Browser extension, Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Popup Blocker (strict) FAQ
What is Popup Blocker (strict)?
It is a browser extension that intercepts requests for new windows and blocks them before they open.
How do I allow or block a popup?
The extension lists each request. You can deny it, allow it, open it in a background tab, or redirect the current page to its URL.
Which browsers are supported?
Installation links are provided for Chrome, Edge, Firefox, Opera, and Firefox for Android through official browser stores.
Is Popup Blocker (strict) open source?
Yes. It is an open-source project released under the MPL-2.0 license with code hosted on GitHub.
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