Recent Changes

Injecting a userscript now requires a special extension permission.
You can find instructions on how to enable this permission here.

General

Fixed GM_xmlhttpRequest being aborted when the background was unloaded ^(gh:2892)

Fixed sometimes failing GM_xmlhttpRequest aborts ^(gh:2888)

Changed GM_xmlhttpRequest to merge given cookies instead of appending them

Fixed the cookie option of GM_xmlhttpRequest to handle the given cookies correctly ^(gh:2829)

Fixed SRI enforce mode of @require

Fixed an issue where a failed reconfiguration of the extension blocked loading of all pages ^(gh:2456)

Fixed a potential crash of the offscreen document

Allowed scriptcat.org to detect installed scripts and their versions

Fixed the external options API to return all supported methods

Chrome

Added support for opening a local userscript file and tracking its changes on disk to speed up development

Workarounded an issue where repeated GM_xmlhttpRequests filled the browser's filtered_service_worker_events list with empty entries

Speed up recognition of the Allow User Scripts option being enabled

Any save or download now prompts for the optional download permission
Note: This can be disabled by setting Download Mode to Native

General

Model Context Protocol (MCP) support for AI tools
Note: requires Tampermonkey Editors browser extension (Firefox|Chrome) and a user action to enable it

Decoupled update checks from the actual update process; set "Automatic installation" as needed

Reduced the number of desktop‑notification alerts for script updates

Streamlined GM_xmlhttpRequest performance

Reworked GM_addElement to always return the created element and null in case of failure

Suppressed black‑listed and browser‑restricted pages from being shown as injectable

Added provisioning support for installing scripts via OS policies

Scripts with @run-at context-menu can now be launched from the popup menu

Improved the context menu update rate

Fixed header parameter and conflictAction handling in GM_download

GM_download now uses the initiator tab’s cookie store and got an anonymous option

window.focus now also brings the window to the front

Corrected handling of repeatedly‑navigating iframes

Fixed imports so external resources are never treated as importable userscripts

Enable importing files that contain only global settings

Fixed an issue where content scripts were not unregistered when the extension was globally disabled

Improved factory reset to clear additional stored data

Resolved multiple field‑reported crashes

Tweaked in-page notifications

Added extra editor commands for easier editing on touch devices

Refined the import‑file selector so it only accepts the appropriate file types

Added a title that shows the current state of the global enabler

Fixed a minor UI glitch that appeared in wide browser windows

Added regular expression support to the script search

Reworked global hints to allow live updates without a page reload

Improved keyboard navigation of tabs

Added editor theme 'Claude' | thanks to coffeechococake7

Locales

Added Hebrew translation | thanks to EliShteinman

Updated Chinese (traditional) translation | thanks to MaxHasBeenUsed

Updated Italian translation | thanks to bovirus

Updated Portuguese translation | thanks to Blackspirits

Updated Vietnamese translation | thanks to IoeCmcomc

Updated Japanese translation | thanks to shirayuki

Updated Belarusian translation | thanks to Pavel Miniutka

General

Fixed setting relative paths via window.location

Fixed GM_xmlhttpRequest to allow sending FormData objects with duplicate keys

Improved script installation and import

Allow script storage editor to be saved using ctrl+s

Fixed some issue with the script update column

Locales

Greek translation updated | thanks panos78