Block hidden tracker iframes
Detects iframes pointing to known analytics and ad domains and removes their source.
Code to copy
(function () {
var bad = /doubleclick|google-analytics|googletagmanager|googlesyndication|
scorecardresearch|quantserve|adservice|facebook\.com\/tr|connect\.facebook|
hotjar|mixpanel|segment\.io|adnxs|criteo/i.source.replace(/\s+/g, '');
var re = new RegExp(bad, 'i');
document.querySelectorAll('iframe[src]').forEach(function (f) {
if (re.test(f.src)) {
f.style.setProperty('display', 'none', 'important');
try { f.removeAttribute('src'); } catch (e) {}
}
});
})();How to use this example
- Copy the code with the button above.
- Install JustZix (2 minutes) and open the extension on the target page.
- Add a new rule matching that page.
- Paste the code into the rule's JavaScript panel and save — it runs on every page visit.
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