tabOS is a browser extension that turns the new tab page and sidebar into a personal desktop similar to an operating system. It integrates tab management, AI chat, notes, images, and RSS subscriptions side by side, accessible with one click at any time. The official description says it is one-click installation, no registration required, permanently free, and allows creating up to 3 desktops for free with no time limit. It uses "desktops" as the core organizational unit, allowing users to handle tabs like managing files in an operating system, with click, hold, drag, and release for box selection, hold space to preview selected items, support for cut, copy, right-click menu, ⌘G to create a group (4 items), ⌘D to discard (hibernate) tabs, ⌘A to select all, and other operations. It can also use quick fuzzy search to find items, keep commonly used tools nearby, invite others to collaborate, use shared chatbots, and visualize data and bookmarks in a clear way. It offers dark and light theme options, is secure by default, including end-to-end encryption, daily backups, and accessibility at any time. It is suitable for users who want to reduce tab clutter, turn the browser homepage into a workbench, and centrally manage information and team collaboration. Regarding specific pricing, supported browser types, data storage locations, etc., the official page does not currently provide them.