Open Tagalong on the page you want to test and add that site.
Use a GTM container you control.
Reload the page, then watch tags fire as you click through.
Tip: pin Tagalong to your toolbar (puzzle icon → pin) so it's one click away on every site.
Reload after changing settings; check the site is in your list and turned on. If the site's security policy blocks it, turn on "Remove security policy" for that site. That fixes policies sent by the server, not ones written into the page.
Turn on "Replace existing container" for that site.
Start Preview in Tag Assistant, enter the site URL, and keep injection on for that domain.
Tags send data to many third-party domains, and Chrome only lets an extension see a request if it can access both the page and the request's destination. Tagalong asks only when you first open Inspect, and nothing leaves your browser.
chrome://extensions → Tagalong → Details → Site access.
Chrome doesn't allow extensions on chrome:// pages, the Chrome Web Store, and some built-in pages.
Turn the toggle on for that tab, reload, and check you're viewing the right GA4 property. Events can take a minute to appear.
Its script loaded but it hasn't sent anything. Many vendors only send data after an action, like add to cart.
Email [email protected] with your Tagalong version (bottom of the popup), the page URL, and the output of Copy QA summary.
1.0.0 · First release · Date TBA
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Tagalong is not affiliated with or endorsed by Google, Meta, or any other vendor.