Sideview - AI Chat Sidebar by Sideview

Keep ChatGPT, Claude, Gemini and more beside your browser tabs. Open multiple chats and pick up where you left off.

About this extension

Sideview keeps the AI chat you already use open in Firefox's sidebar, so you can ask about what you are reading without switching tabs or losing your place.

Open several chats at once, with the same AI or different ones, each in its own tab. They stay beside every page you visit and come back when you reopen the sidebar.

Works with the chat you use

ChatGPT, Claude, Gemini and other popular AI chat sites work straight after install. The sidebar shows each AI's own website, signed in with your own account, so your plan, history and settings come with it. Hide the ones you don't use and put the rest in your order. The full list is at sideview.app.

No API keys, no extra account

Sideview uses the accounts you are already signed in to. The free version needs no Sideview account and does not contact Sideview's servers. It reads page text only when you choose Send selection to chat, and does not read conversation contents.

Free

Sidebar that stays open across tabs; toggle it from the toolbar button or Alt+Shift+S
A tab for each chat: rename, pin and star chats, and hover a tab for a preview
A start page with your starred and recent chats, and a search box once the list grows
Alt+1 to Alt+9 pick a tab and Alt+0 shows the start page
Send selected text to the chat
Sign-in hand-off: if an AI needs you to sign in in a normal tab, Sideview opens one and brings you back to the sidebar signed in
Unused tabs sleep to save memory
Text size for each AI, light/dark theme, start AI, order and visibility
Back up and restore settings; interface in nine languages

Sideview Pro (optional subscription, $5 USD a month or $40 USD a year, plus applicable tax; cancel any time)

Send the page, a screenshot, an image, a PDF, a video transcript, a link or several tabs to the chat
Right-click Summarize, Explain and Translate
Quick search (Alt+Shift+K) for every action, and saved prompts with fill-in blanks, synced through Firefox Sync
Split view: up to four chats side by side in the sidebar
Compare up to four AIs with one question, in the sidebar or a full tab, and ask another AI to check an answer
Export a chat as Markdown or PDF, or send it to Obsidian
Quick chat dock on web pages, off until you turn it on
Site rules: open a chosen AI or chat on chosen sites
Workspaces, a scratchpad, reply notifications, added chat sites and optional chat sync between your computers

Teams (optional subscription, at least three seats)

Pro for every member, one invoice, shared prompts and site rules, team defaults and owner/admin/editor/member roles. Team prices are at sideview.app/pricing.

Pro tools read a page only when you use them. Page text and screenshots go into the chat you chose, never to Sideview.

Privacy

Sideview has no browsing analytics. Chat addresses and titles stay on your device unless you turn on chat sync, which goes through Firefox Sync. Conversations remain with your AI providers. Signing in lets Sideview check your plan and, for teams, download shared prompts, rules and defaults. Firefox asks for optional data permissions for account access, chat sync and team activity, and the free sidebar works if you decline.

Sideview is an independent project and is not affiliated with or endorsed by any of the AI providers it can display. All product names and logos belong to their owners.

Privacy policy · Permissions explained

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Permissions and data

Required permissions:

Clear recent browsing history, cookies, and related data
Access your data for chatgpt.com
Access your data for claude.ai
Access your data for gemini.google.com
Access your data for www.copilot.com
Access your data for copilot.microsoft.com
Access your data for grok.com
Access your data for www.meta.ai
Access your data for chat.mistral.ai
Access your data for chat.qwen.ai
Access your data for www.kimi.ai
Access your data for poe.com
Access your data for duck.ai
Access your data for www.perplexity.ai
Access your data for chat.deepseek.com

Optional permissions:

Display notifications to you
Access browser tabs
Access your data for sites in the oaiusercontent.com domain
Access your data for sites in the claudeusercontent.com domain
Access your data for sites in the claudemcpcontent.com domain
Access your data for sites in the grokusercontent.com domain
Access your data for sites in the metaaiusercontent.com domain
Access your data for sites in the mistralusercontent.com domain
Access your data for chatgpt.com
Access your data for auth.openai.com
Access your data for claude.ai
Access your data for gemini.google.com
Access your data for www.copilot.com
Access your data for copilot.microsoft.com
Access your data for grok.com
Access your data for www.meta.ai
Access your data for chat.mistral.ai
Access your data for chat.qwen.ai
Access your data for auth.qwen.ai
Access your data for www.kimi.ai
Access your data for poe.com
Access your data for duck.ai
Access your data for www.perplexity.ai
Access your data for chat.deepseek.com

Data collection:

The developer says this extension doesn't require data collection.

Optional data collection, according to the developer:

Authentication information
Browsing activity
Personal communications
Personally identifying information
Technical and interaction data
Website content