Are you familiar with OTR (<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Off-the-Record_Messaging" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Off-the-Record_Messaging</a>)? It sounds like it may be what you&#x27;re looking for (and I&#x27;d be surprised if there weren&#x27;t already browser plugins for it).