Side-by-side comparison · AI Browsers & Agents
Firefox 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 2 tools. Add one more if you like.
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: Anyone who researches, compares or reads a lot online and wants an AI helper in the browser without paying for it.
Comet scores highest overall, but Firefox gives you more for your money. Which one is right comes down to what you value most.
Overview
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Firefox | Comet |
|---|---|---|
| Overall rating | 3.6 | 3.9Winner |
| Ease of useHow quickly someone non-technical gets value from it. | 3.5 | 4.5 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 3.0 | 4.0 |
| Output qualityHow good the results are before you fix them. | 3.5 | 3.5 |
| Value for moneyWhat you get for the price, including the free plan. | 4.5 | 4.0 |
| Speed & reliabilityHow fast it is and how often it falls over. | 3.5 | 3.5 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Firefox | Comet |
|---|---|---|
| Access & platform | ||
| Free plan | Yes | Yes |
| Mobile app | Yes | Yes |
| Desktop app | Yes | Yes |
| Browser extension | No | Yes |
| API access | No | No |
| Teams & business | ||
| Team workspace | No | Yes |
| Enterprise plan or SSO | Yes | Yes |
| Connects to other apps | Yes | Yes |
| Open source or self-hosted | No | No |
| AI abilities | ||
| Works with your files | No | Yes |
| Understands images | No | Yes |
| Makes images | No | No |
| Makes video | No | No |
| Writes code | No | No |
| Runs agents or automations | No | Yes |
| Learns your brand or style | No | No |
| Works in many languages | Yes | Yes |
| Capabilities score | 6/ 17 | 11/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Firefox | Comet |
|---|---|---|
| Plans | FirefoxOur pick Free Everyone, with AI on or off as you choose. | FreeOur pick Free Everyday browsing with an assistant for summaries and questions. |
Smart Window beta Free Heavy researchers in the US, Canada or France. | Comet Plus $5/mo Readers who want partner publishers' paywalled articles. | |
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. | 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
Pros and cons
| Attribute | Firefox | Comet |
|---|---|---|
| Pros |
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| Cons |
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Who each one is for
| Attribute | Firefox | Comet |
|---|---|---|
| Best for |
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| You'll find it used by |
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Questions people ask
Which is better, Firefox or Comet?
Comet scores highest overall in our ratings (Firefox 3.6/5 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. Comet is best for summarising long pages, PDFs and videos and comparing products or suppliers across tabs.
Which is cheaper, Firefox or Comet?
Firefox: It's free and open source. Comet: There's a free plan, and paid plans start at $5/mo.
Which is easier to use, Firefox or Comet?
Comet rates highest for ease of use in our scores. Anyone who researches, compares or reads a lot online and wants an AI helper in the browser without paying for it.
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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