The AccessDEQ external portal is supported on Microsoft Edge and Google Chrome.
Other browsers may work, but have not been as thoroughly tested. This includes Mozilla Firefox and Apple's Safari browser.
While most features and functionality of DEQ's external portal will work just fine with other browsers, there is a known issue using the Electronic Signature Authority (ESA) screen when signing using Safari in particular. When you submit the ESA, you may see a spinning progress wheel that doesn't end up completing its task.