Fixed a Firefox regression where applying a rewrite selected the draft but showed “Apply failed” without replacing it. Also fixed the caret position after replacement so continued typing works reliably. Added real Firefox and Chromium regression tests to every release.

Improved reliability when rewriting posts and replies on X, including multiline drafts and Undo. Fixed duplicated text and composers becoming stuck. Editing is temporarily locked during generation, with Cancel in the XCompose dropdown and a 60-second timeout to restore editing if a request stalls. Other generation actions are disabled while a request is running. Fixed OpenCode Go session IDs and improved request cancellation.