We recommend that you use one of the following supported browsers with Google Tag Manager:
In general, the two most-recent major releases of Chrome, Firefox, Edge, and Safari (on a rolling basis) are supported.
When you upgrade to a supported browser, you may also need to update your browser preferences to allow cookies and JavaScript in order to use all the tools available.
Older web browsers can have problems with tag behavior. These issues are less common in modern web browsers. If your product requires support for older browsers, test thoroughly with preview and debug mode before deployment.