/ Choose Blync: Preview Links, Selection Search and AI Assistant Popup & Sidebar (ChatGPT, Gemini) if
Its stated focus matches what you need: Preview links, search the web using selection search or quick search without leaving your current tab and use AI (ChatGPT, Gemini) in popup & sidebar.
/ Choose KTool: Send web articles, newsletters and RSS feeds to your Kindle if
Its stated focus is closer to your workflow: KTool is the ultimate Kindle tool. It lets you send web articles to Kindle: blog posts, Hacker News discussions, newsletters and many more.