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Enable Browser User Scripts Support

Due to browser restrictions, extensions are forced to upgrade to Manifest V3, and Manifest V2 extensions will be completely discontinued after June 2025;

Under the limitations of Manifest V3, you must enable developer mode/user scripts functionality to use ScriptCat extension normally.

Reference: Developer mode for extension users, Manifest V3

⚠️⚠️⚠️ For browser kernel versions >=138, you need to enable Allow User Scripts. For lower versions <138, use Enable Developer Mode.

⚠️⚠️⚠️ Please note: If you are using Windows 8/7/XP systems, or browser kernel versions lower than <120, you need to manually install the legacy ScriptCat. v0.16.x is the last version that supports Manifest V2. Installation steps can be found at: Load unpacked extension installation.

Allow User Scripts​

Allow User Scripts is a new feature of Manifest V3 that allows user scripts to run in the browser.

① Open the browser's extension management interface, or visit edge://extensions/

edge-open-settings

② In the extension management interface, find the ScriptCat extension and click Details

edge-extensions-details

③ In the ScriptCat extension details page, find the Allow user scripts option and enable it. Then disable and re-enable the extension, or restart the browser to make the script functionality effective.

⚠️⚠️⚠️ For lower version Edge browsers (<=143 version) or users without this option, please refer to Enable Developer Mode

edge-allow-user-scripts

Enable Developer Mode​

① Open the browser's extension management interface, or visit edge://extensions/

edge-open-settings

② Enable Developer mode (In some browsers, this mode may be located in other options, such as 360 Browser: Advanced Management > Developer Mode)

edge-open-dev

③ After enabling developer mode, disable and then re-enable the extension, or restart the browser to make the script functionality effective.