1, Load data:text/html,<details open>bbb <summary>ccc</summary> ddd</details> 2. Select all (⌘-A / Ctrl-A) Expected result: All text blocks are selected and they have selected color (blue background). Actual result: The summary text don't have selected color. This seems a visual problem. I confirmed the summary text was actually selected by copy&paste.
*** This bug has been marked as a duplicate of bug 61110 ***
Not a duplicate.