94e23b3d89
The 'safe' flag actually causes overflow to be lost, in cases where the flex container is set up to scroll in the reverse direction. The spec says to use that flag here, but I don't think other browsers do (and we didn't either until recently); and I'm proposing we change the spec in https://github.com/w3c/csswg-drafts/issues/11937 Differential Revision: https://phabricator.services.mozilla.com/D241670
Common testing tools for mozilla codebase projects, test suite definitions for automated test runs, tests that don't fit anywhere else, and other fun stuff