I did found that the codebase does not seem to be using any `browser.clipboard` API, so `clipboardWrite` permission seems to be unnecessary. According to [MDN](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/Web...), `browser.clipboard` API mainly exists to enable extensions to write image contents to clipboards, and all the ClearURL needs is writing texts. Also, [another MDN page on clipboard interactions](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/Web...) states that extensions do not need `clipboardWrite` permissions to write to clipboards, e.g. by using `document.execCommand('copy')`.

Hopefully, removing this permission could help getting the extension restored.