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Cebian · AI Side Panel Agent by 猫头猫

Side panel AI agent. BYO key (OpenAI/Anthropic/Google), no account. Element picker, MCP tools, skills. AGPL-3.0, local-first.

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About this extension

Cebian is an open-source AI assistant in Firefox's sidebar. Add your own OpenAI, Anthropic, Google, or compatible API key—no account required. Read pages, select elements, and use reusable prompts, Skills, and MCP tools. Data stays in your browser.

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Permissions and data

Required permissions:

Read and modify bookmarks
Get data from the clipboard
Download files and read and modify the browser’s download history
Access browsing history
Display notifications to you
Access recently closed tabs
Access browser tabs
Access browsing history
Access browser activity during navigation
Access your data for all websites

Required data collection, according to the developer:

Authentication information
Bookmarks
Browsing activity
Personal communications
Search terms
Website activity
Website content