Install Omni Sidekick from the Chrome Web Store in one click, pin it with the puzzle piece menu, and confirm it is enabled. Takes under a minute and needs no account or credit card.
If the toolbar icon does not show after install, open chrome://extensions, confirm the extension is present and toggled on, and pin it again from the puzzle piece menu.
Onboarding asks for one thing: an OpenRouter API key. Create one at OpenRouter, add a little credit, and paste it in. Omni validates it immediately on save.
Two gestures cover most of what Omni does: select text anywhere and run a rewrite, or take a screenshot and ask a question about it. Onboarding gets you there in 90 seconds.
The side panel is chat with the page as context, the editor is where captures are annotated and sent to a model, and the command palette reaches every action from the keyboard.