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://github.com/ClearURLs/Addon/blob/master/external_js/c...
document.execCommand("copy");
I personally do not know, just going by what's stated within the URL in the adjoining comment (https://github.com/mdn/webextensions-examples/tree/master/co...).