Document directory:, the Firefox shortcut limit, and the new save options directory: matches the folder picked from the menu, where menuindex: matches by position — inserting a folder renumbers every index, which is why the name matcher exists. Firefox refuses to save a filename ending .url or .desktop and fails the whole download rather than renaming it, so those shortcut formats are not offered there. It has done this since 112 (bug 1815062 / CVE-2023-29542) and Save In's Windows/macOS/Freedesktop formats land exactly on that list, so it belongs in the capability table beside the other cross-browser differences rather than in a release note nobody rereads. The duplicate-filename prompt row is the same class and was equally undocumented. The save options are new or changed: quick-save-only removes the submenu (the only way to reach a one-click save, since browsers collapse more than one item), click to save can stop inheriting the last folder, and the MIME extension is off by default because it renames a save you did not ask it to rename and costs a request to the site. Edge whitespace is trimmed because browsers reject a path component that begins or ends with it.

gyng committed Jul 16, 2026

Document cross-browser Referer rules

gyng committed Jul 14, 2026

Document authenticated download context

gyng committed Jul 13, 2026

Refresh documentation for current features

gyng committed Jul 13, 2026

Add Firefox vs Chrome page; mark offscreen documents shipped in MV3 page

gyng committed Jul 10, 2026