GPL extension
Free
Ongoing; models/hardware/services separate
- Included scope
- Page Q&A; extraction; Ask/Act modes; local Chromium MCP bridge
WebBrain
● Identity checkedBrowser-native AI assistance and automation · Official-source review 2026-10-09
WebBrain is a browser extension that reads pages, extracts data and performs approved browser tasks with a chosen model. Read-only Ask mode is the default, while Act mode provides interactions; a local MCP bridge connects external coding clients.
- Category
- Browser-native AI assistance and automation
- Free access
- Extension is free without an account under GPL-3.0-or-later; cloud model usage, local hardware and optional third-party services are separate.
- API access
- OpenAI-compatible and local model endpoints are supported; stdio MCP bridge exposes six task tools for Chromium tabs, excluding Firefox.
Is WebBrain right for you?
A good fit for
Relevant to users reviewing current-page context and browser actions in an existing signed-in session.
Before you choose
Chrome 116+ and Firefox 109+ are listed; Edge extension requires Windows 10/11 and is not supported on Mac/Linux. Local models recommend 16k context or 8k compact mode. Supported local configuration can keep processing on device, but cloud prompts/screenshots go to the selected provider. Optional profile autofill stores a plaintext bio locally and is off by default. Act mode can run scripts and modify pages, so inspect task permissions. Privacy, injection defenses, speed and cost predictability claims were not independently tested. It detects paywalls rather than claiming access. No extension, external solver, signed-in tab or agent task was used.
Workflow and handoff
Use a public fixture page in Ask mode, inspect transmitted context and extracted data and check action approvals before any authenticated workspace.
Pricing and practical limits
Chrome 116+ and Firefox 109+ are listed; Edge extension requires Windows 10/11 and is not supported on Mac/Linux. Local models recommend 16k context or 8k compact mode. Supported local configuration can keep processing on device, but cloud prompts/screenshots go to the selected provider. Optional profile autofill stores a plaintext bio locally and is off by default. Act mode can run scripts and modify pages, so inspect task permissions. Privacy, injection defenses, speed and cost predictability claims were not independently tested. It detects paywalls rather than claiming access. No extension, external solver, signed-in tab or agent task was used.
Review method
Official product evidence reviewed on 2026-10-09; product artwork inspected visually. No hands-on vendor application test was performed. Application performance, security claims and plan enforcement were not independently tested.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Product workflow | WebBrain is a browser extension that reads pages, extracts data and performs approved browser tasks with a chosen model. Read-only Ask mode is the default, while Act mode provides interactions; a local MCP bridge connects external coding clients. | Facts sourced | 2026-10-09 |
| Pricing and restrictions | Chrome 116+ and Firefox 109+ are listed; Edge extension requires Windows 10/11 and is not supported on Mac/Linux. Local models recommend 16k context or 8k compact mode. Supported local configuration can keep processing on device, but cloud prompts/screenshots go to the selected provider. Optional profile autofill stores a plaintext bio locally and is off by default. Act mode can run scripts and modify pages, so inspect task permissions. Privacy, injection defenses, speed and cost predictability claims were not independently tested. It detects paywalls rather than claiming access. No extension, external solver, signed-in tab or agent task was used. | Facts sourced | 2026-10-09 |
Understand the total cost
WebBrain pricing & plans
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Explore toolThe practical questions
Frequently asked questions
Was the application hands-on tested?
No. This listing is based on dated official-source evidence and a visual artwork check. Unconfirmed costs and restrictions are identified explicitly.
What is WebBrain used for?
WebBrain is a browser extension that reads pages, extracts data and performs approved browser tasks with a chosen model. Read-only Ask mode is the default, while Act mode provides interactions; a local MCP bridge connects external coding clients.
Does WebBrain have a free plan?
Extension is free without an account under GPL-3.0-or-later; cloud model usage, local hardware and optional third-party services are separate.. This record lists ongoing free access; check the plan limits before starting.
How much does WebBrain cost?
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use WebBrain through an API?
OpenAI-compatible and local model endpoints are supported; stdio MCP bridge exposes six task tools for Chromium tabs, excluding Firefox.. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Chrome 116+ and Firefox 109+ are listed; Edge extension requires Windows 10/11 and is not supported on Mac/Linux. Local models recommend 16k context or 8k compact mode. Supported local configuration can keep processing on device, but cloud prompts/screenshots go to the selected provider. Optional profile autofill stores a plaintext bio locally and is off by default. Act mode can run scripts and modify pages, so inspect task permissions. Privacy, injection defenses, speed and cost predictability claims were not independently tested. It detects paywalls rather than claiming access. No extension, external solver, signed-in tab or agent task was used.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Official product information
Current official product source read individually; product artwork inspected visually.
Read original source ↗Pricing review
Official product page reviewed for disclosed costs; unverified prices and allowances are identified in the listing.
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.