With the changes on bug 1444491 auto-focus related tests are likely to fail after a navigation with Marionette. See bug 1816955 and bug 1817124. As per temporary fix clients could execute a script to wait for the next animation frame, which would wait for the next page rendering and the auto-focus to be set. This needs to be discussed and a WebDriver spec issue filed. I can do the latter later today.
Bug 1817774 Comment 0 Edit History
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With the changes on bug 1444491 auto-focus related tests are likely to fail after a navigation with Marionette. See bug 1816955 and bug 1817124. As per temporary fix clients could execute a script to wait for the next animation frame, which would wait for the next page rendering and the auto-focus to be set. This needs to be discussed and a WebDriver spec issue filed (not sure how BiDi should handle that). I can do the latter later today.