I see. The Chrome.tabs library that I use does allow this. Your clever workaround might be enough though.<p>While I&#x27;m at it, is there a way to give a regular web app the kind of permissions that a Chrome extension manifest can give? It isn&#x27;t just tab mechanics I need, but clipboard access and cross-domain privileges. Obviously this would still require client consent (and might still be Chrome-only) but it would be easier than an extension with all its deployment headaches.