Issue Summary

Some content might be unavailable under some circumstances because of not having the best code practices. The results were thrown by axe-core chrome extension. 

Steps to Reproduce

1. Steps to reproduce (on Chrome):
   Make sure axe extension is installed on Chrome:
   https://chrome.google.com/webstore/detail/axe-web-accessibility-tes/lhdoppojpmngadmnindnejefpokejbdd?hl=en-US
2. Access a site and run the check:

Expected Results

Nothing should have conflicts.

Actual Results

The auditor reports issues in the majority on this element: atlassian-navigation--header
Some of the issues come from this frame element: com.chegg.prodtutorsclient_tutors-client-prod_142c5656

Workaround

No workaround, any feature apparently affected.