Rated 5 out of 5 stars

by trashbasu on March 15, 2025 ·

Many thanks to "the-nic" for offering a solution to use this add-on on TB 136.

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To make the addon work on 136, one only has to update strict_max_version in the manifest version and change the first lines in experiment.js to

const { ExtensionCommon } = ChromeUtils.importESModule(
"resource://gre/modules/ExtensionCommon.sys.mjs");

then it works again :)
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Sorry for the spelling, but English is not my native language.

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": "136.*"
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.- Install the plugin in TB.

I hope it's useful for others. I don't know if there's a better way to accomplish this.

Regards and thanks again to the-nic.