Side-by-side comparison · AI Browsers & Agents
Firefox vs Microsoft Edge vs Comet
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: Business owners who want a trusted, independent browser and want to decide for themselves whether AI is on or off.
Pick it if: Windows and Microsoft 365 users who want AI help with reading, comparing and researching in the browser they already have.
Pick it if: Anyone who researches, compares or reads a lot online and wants an AI helper in the browser without paying for it.
Overview
| Attribute | Firefox | Microsoft Edge | Comet |
|---|---|---|---|
| In one line | Mozilla's free browser with optional AI you can switch off with one setting. | Microsoft's free browser with Copilot built in to read pages, compare tabs and do tasks. | Perplexity's free web browser with an assistant that reads your tabs and does tasks. |
| Pricing model | Free | Freemium | Freemium |
| Starting price | Free | $19.99/mo | $5/mo |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | No | No | No |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Firefox | Microsoft Edge | Comet |
|---|---|---|---|
| Overall rating | 3.6 | 3.9 | 3.9 |
| Ease of useHow quickly someone non-technical gets value from it. | 3.5 | 4.5 | 4.5 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 3.0 | 3.5 | 4.0 |
| Output qualityHow good the results are before you fix them. | 3.5 | 3.5 | 3.5 |
| Value for moneyWhat you get for the price, including the free plan. | 4.5 | 4.0 | 4.0 |
| Speed & reliabilityHow fast it is and how often it falls over. | 3.5 | 4.0 | 3.5 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Firefox | Microsoft Edge | Comet |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | Yes | Yes |
| Desktop app | Yes | Yes | Yes |
| Browser extension | No | Yes | Yes |
| API access | No | No | No |
| Teams & business | |||
| Team workspace | No | Yes | Yes |
| Enterprise plan or SSO | Yes | Yes | Yes |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | No | No | No |
| AI abilities | |||
| Works with your files | No | Yes | Yes |
| Understands images | No | Yes | Yes |
| Makes images | No | Yes | No |
| Makes video | No | No | No |
| Writes code | No | No | No |
| Runs agents or automations | No | Yes | Yes |
| Learns your brand or style | No | No | No |
| Works in many languages | Yes | Yes | Yes |
| Capabilities score | 6/ 17 | 12/ 17 | 11/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Firefox | Microsoft Edge | Comet |
|---|---|---|---|
| Plans | FirefoxOur pick Free Everyone, with AI on or off as you choose. | FreeOur pick Free Most people: summaries, tab comparisons and Journeys. | FreeOur pick Free Everyday browsing with an assistant for summaries and questions. |
Smart Window beta Free Heavy researchers in the US, Canada or France. | Microsoft 365 Premium $19.99/mo, or $199.99/yr US households and sole traders who want the agent and Office apps in one bill. | Comet Plus $5/mo Readers who want partner publishers' paywalled articles. | |
Microsoft 365 Copilot (business) See website Companies on Microsoft 365 business plans. | Perplexity Pro $20/mo, or $200/yr Anyone who wants the agent to do tasks for them. | ||
Perplexity Max $200/mo, or $2,000/yr Heavy users running many tasks in the background. | |||
| Which plan to pick | There's nothing to pay. Use the sidebar with whatever AI account you already have. If you're in the US, Canada or France, try Smart Window with a free Mozilla account. Everyone else can join the waitlist. | Stay on free. The side panel, tab comparisons and Journeys cover what most business owners need, and they cost nothing. Microsoft 365 Premium is only worth it if you're in the US and already want Office for the household; don't buy it just for the browser agent, which Microsoft still calls experimental. | Use it free: the sidebar assistant alone is worth having, and most people never need more. Pro makes sense if you want Perplexity's research tools anyway, but don't buy it just for the browser agent, since Pro's credits are a one-off bundle. Nobody needs Max just for the browser. |
Key features
| Attribute | Firefox | Microsoft Edge | Comet |
|---|---|---|---|
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Pros and cons
| Attribute | Firefox | Microsoft Edge | Comet |
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Who each one is for
| Attribute | Firefox | Microsoft Edge | Comet |
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Questions people ask
Which is better, Firefox, Microsoft Edge or Comet?
They tie on our overall rating (Firefox 3.6/5, Microsoft Edge 3.9/5 and Comet 3.9/5). Firefox is best for Keeping AI out of the browser entirely and using your own ChatGPT or Claude in a sidebar. Microsoft Edge is best for summarising long pages and PDFs and comparing products or quotes across open tabs. Comet is best for summarising long pages, PDFs and videos and comparing products or suppliers across tabs.
Which is cheaper, Firefox, Microsoft Edge or Comet?
Firefox: It's free and open source. Microsoft Edge: There's a free plan, and paid plans start at $19.99/mo. Comet: There's a free plan, and paid plans start at $5/mo.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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