You can easily add the Feedbucket script tag using Google Tag Manager. Just follow the steps below.
New Tag
as shown in the screenshot below.Custom HTML
as shown in the screenshot below.Copy the Feedbucket script tag by going to your project > installation > Add the script code manually on dashboard.feedbucket.app and paste it into the custom HTML.
Make sure that you select the Support document.write
or Feedbucket will most likley not load.
Under the section Triggering
select All Pages
like below screenshot.
Click on Save
to store your new tag.
Click on Submit
to publish the new tag.
You might have to clear your browser cache to see Feedbucket installed through Google Tag Manager.