Updated 4.1 Extensions (markdown)

4.1-Extensions.md

@@ -40,6 +40,8 @@ This list covers privacy and security related extensions only. While we believe
       - an extra layer of isolation, see [bugzilla 1767271](https://bugzilla.mozilla.org/1767271)
       - signing in to multiple accounts on the same site
       - MAC and Mozilla VPN adds [advanced VPN and proxy settings](https://support.mozilla.org/en-US/kb/use-multi-account-containers-mozilla-vpn)
+  - about TC
+     - TC is [no longer being developed](https://github.com/stoically/temporary-containers/issues/618)
      - While TC provides sanitizing, and uses a [dFPI-compatible API](https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/contextualIdentities/remove), this is not why it is recommended as optional, see `Cookie extensions` in the `DON'T BOTHER` section below
 * [Request Control](https://addons.mozilla.org/firefox/addon/requestcontrol/) | <sup>[github](https://github.com/tumpio/requestcontrol)</sup> | <sup>[manual](https://github.com/tumpio/requestcontrol/blob/master/_locales/en/manual.wiki)</sup> | <sup>[testing links](https://github.com/tumpio/requestcontrol/wiki/Testing-links)</sup>
 * [Redirector](https://addons.mozilla.org/firefox/addon/redirector/) <sup>✔ [privacy](https://github.com/einaregilsson/Redirector/blob/master/privacy.md)</sup> | <sup>[github](https://github.com/einaregilsson/Redirector)</sup>