Round 1 fixed the three smoke headers and AGENTS.md but left the same
overstatement in the two files Copilot flagged as previously-missed:
- README said the matrix runs 'the remaining engines', which reads as
Firefox AND WebKit and contradicts the very next paragraph. It now
names the current matrix (Firefox alone) and points at that paragraph.
- The workflow's fail-fast comment cited a WebKit-vs-Firefox scenario the
one-entry matrix cannot produce. It now justifies keeping the flag for
when a second engine returns, matching the AGENTS.md wording.
Swept the whole tree for the remaining variants of the claim; none left.
Addresses the suppressed comments on Copilot's second review of #2133.
Signed-off-by: cliffhall <cliff@futurescale.com>
03efc2df18