[BUG]: Copy To Clipboard

Context:

• Playwright Version: 1.0.0-next.1587832636942
• Operating System: Mac
• Extra: [any specific details about your environment]

Code Snippet

Help us help you! Put down a short code snippet that illustrates your bug and that we can run and debug locally. For example:

const context = await browser.newContext();
context.grantPermissions(['clipboard-read']);

Describe the bug

The above snippet produces the following error:

Unknown permission: clipboard-read

this occurs when I run yarn test

[mirao]

Reading from clipboard works with FF 99, but you have to set the Firefox option "dom.events.testing.asyncClipboard": true, put it into firefoxUserPrefs.

[dgozman]

From readText MDN article:

Firefox only supports reading the clipboard in browser extensions, using the “clipboardRead” extension permission.

That means await navigator.clipboard.readText() will not work in Firefox, so testing it and granting the permission is pointless.