Rated 5 out of 5 stars

bởi Firefox user e1fa41 vào Tháng 12. 23, 2025 ·

This should work.

1. Change the plugin extension from .xpi to .zip
2. Unzip the .zip file
3. Edit manifest.json with Notepad
4. Change "strict_max_version": "128.*" to "strict_max_version": "146.*"
5. Save
6. Edit experiment.js with Notepad
7. Change
const { ExtensionCommon } = ChromeUtils.import(
"resource://gre/modules/ExtensionCommon.jsm");
to
const { ExtensionCommon } = ChromeUtils.importESModule(
"resource://gre/modules/ExtensionCommon.sys.mjs");
8. Save
9. Zip all files back into a new .zip file.
10. Change the .zip extension to .xpi
11. Click "Tools for all add-ons" (the icon like "Settings"
12. Clcik "Install add-ons from File..."
13. Choose .xpi file

⚠️ Important note (Step 4):
Check your current Thunderbird version and set strict_max_version accordingly.
If the plugin stops working in the future, update the strict_max_version to match your current Thunderbird version.