The dialog can be triggered from this link: https://lgg.epfl.ch/teaching/ICG2019/icg_lectures/01a-Introduction.html#/ (HTTP Authentication)

This needs the styling to be fixed and a try push too, but manual testing works OK.

Can you set a priority on this, please?

Backed out for mochitest failures in test_prompt_async.html

Push with failure: https://treeherder.mozilla.org/#/jobs?repo=autoland&resultStatus=pending%2Crunning%2Csuccess%2Csuperseded%2Ctestfailed%2Cbusted%2Cexception%2Crunnable&searchStr=linux%2Cx64%2Casan%2Cmochitests%2Ctest-linux64-asan%2Fopt-mochitest-e10s-10%2Cm%2810%29&fromchange=caa26030e1f2b50fe93ddd3daa190a36f22a5ad4&selectedJob=268469686

Failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=268469686&repo=autoland&lineNumber=8173

Backout: https://hg.mozilla.org/integration/autoland/rev/220a3c19ebd3ffdf6bea71fbcb916cf8cc9639ef

Backed out for mochitest failures in test_bug619644.html

Push with failure: https://treeherder.mozilla.org/#/jobs?repo=autoland&resultStatus=superseded%2Ctestfailed%2Cbusted%2Cexception%2Crunnable&revision=5d590009ce5721c6047c5513e998f0c961dd80b8&selectedJob=268494003

Failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=268494003&repo=autoland&lineNumber=8627

Backout: https://hg.mozilla.org/integration/autoland/rev/e5af40c83e2f41975a17f4fb12a69e71379bfb1f

https://hg.mozilla.org/mozilla-central/rev/ffcbc621a3be