title: Intercepting requests in chrome extension with manifest v3
body: <p>I see that there is no way to inspect the body with <code>declarativeNetRequest</code>.</p>
  <p><a href="https://developer.chrome.com/docs/extensions/mv3/mv3-migration-checklist/" rel="nofollow noreferrer">https://developer.chrome.com/docs/extensions/mv3/mv3-migration-checklist/</a> indicates I should replace <code>webRequestBlocking</code> with <code>declarativeNetRequest</code> permission. But it doesn’t say that <code>chrome.webRequest</code> API is deprecated in v3 (it looks like it is) or how long will it continue to work with manifest v2.</p>
  <p>Should I stick with manifest v2 even though I don’t know how long it will last?
  Google says they made this change for privacy reasons but I don’t see them removing content scripts...</p>