I've developed a Firefox Addon which has a feature of copying some text automatically when the popup window is open. But it doesn't work and gives me this error message.

uncaught (in promise) DOMException: clipboard write was blocked due to lack of user activation.

this works fine on Chrome.

I used clipboard API to do this.

navigator.clipboard.writeText(data).then(()=>{
    console.log('copied')
})

Any thoughts to bypass this or fix this?

CodePudding user response：

You extensions needs to have the clipboardWrite permission to write to the clipboard without user interaction. https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/permissions#clipboard_access