Hi Martin You should be able to make the overide directly in Chrome. 1. Open DevTools 2. Next to the "Elements" tab in DevTools, toggle on the Device Toolbar (it will turn blue when selected and likely resize the page) 3. At the top of the page, you should see "Default" with a drop down arrow, select the dropdown and "Edit" 4. Select "Add Custom Device" a. Add a Device Name - "MyUserDevice" b. Add a Custom User Agent String c. Select "Add" 5. Return to the dropdown at the top of the page and select the device you just added. This should insert the new user agent string, until you set it back or change it to something else. Cheers Kevin UPDATE: Sorry, I missread the issue. When I inspect the GA call I don't see my variable in the request although I do see it in the "Inspect Headers" section when inspecting the call.
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