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Browser Extensions · head to head

FireMonkey vs Metasploit

FireMonkey logo

FireMonkey

Browser Extensions

User scripts and user styles in one Firefox extension

From
Free
Rated
-
Full reviewWebsite
Metasploit logo

Metasploit

Cybersecurity

The world's most used penetration testing framework

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: FireMonkey firefox only, and requires a recent one: version 93 on desktop, 113 on Android.; Metasploit the free Framework edition is command line only; the web interface is Pro only
  • They diverge on capability: FireMonkey covers Scripts and styles together, Metasploit covers Exploit database.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which FireMonkey and Metasploit actually diverge.

Attributes where FireMonkey and Metasploit differ
AttributeFireMonkeyMetasploit
Pricing modelopen-sourcefreemium
PlatformsFirefoxDesktop, Cli
CategoryBrowser ExtensionsCybersecurity
FoundedUnknown2000

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in FireMonkey

  • Scripts and styles together
  • Monaco editor with ESLint
  • Unlimited client-side storage
  • Global injection
  • Notifications and clipboard
  • Firefox for Android

Only in Metasploit

  • Exploit database
  • Payload generation
  • Post-exploitation
  • Evasion modules
  • Auxiliary scanners
  • Social engineering
  • Credential harvesting
  • Session management

What people use each for

The jobs each tool is most often brought in to do.

FireMonkey

  • Running user scripts and user styles without two separate extensionsnot Metasploit
  • Restyling sites with CSS alongside scripted behaviour changesnot Metasploit
  • Editing scripts in a full editor inside the browsernot Metasploit
  • Injecting CSS globally across every sitenot Metasploit
  • Managing a mixed library of scripts and styles from one dashboardnot Metasploit

Metasploit

  • Penetration testing and exploit development against known vulnerabilitiesnot FireMonkey
  • Validating whether a reported vulnerability is actually exploitablenot FireMonkey
  • Running phishing and credential attack simulations on the Pro editionnot FireMonkey

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

FireMonkey

  • Firefox only, and requires a recent one: version 93 on desktop, 113 on Android.
  • Not a drop-in replacement for Greasemonkey, Tampermonkey or Stylus. The project says so itself, so an existing library may need adjusting.
  • A much smaller user base than Tampermonkey or Violentmonkey, which means fewer people have hit the bug you are about to hit.
  • No Chrome, Edge or Safari build, so it cannot be the answer for anyone working across browsers.
  • Combining scripts and styles in one extension also combines the blast radius: one extension with permission to inject both into every page.

Metasploit

  • The free Framework edition is command line only; the web interface is Pro only
  • Automated exploitation, automated credential attacks and antivirus evading dynamic payloads are restricted to Metasploit Pro
  • Reporting, audit wizards, task chains and closed loop vulnerability validation are Pro only
  • Rapid7 publishes no price for Metasploit Pro and routes buyers to contact sales

Pricing, plan by plan

FireMonkey

Free
  • Open sourceFree
    • MPL-2.0 licensed
    • Unlimited scripts and styles
    • No account required

Metasploit

Free
  • Metasploit Framework (OSS)Free
    • Open source
    • 1500+ exploits
    • Command line
  • Metasploit ProFree
    • Web interface
    • Automated testing
    • Phishing campaigns

Which should you pick?

Choose FireMonkey if

  • You need scripts and styles together.
  • You want to start without paying.
  • You work on Firefox.
  • You also want monaco editor with eslint.
FireMonkey review

Choose Metasploit if

  • You need exploit database.
  • You want to start without paying.
  • You work on Desktop, Cli.
  • You also want payload generation.
Metasploit review

Questions people ask

Is FireMonkey or Metasploit better?
Neither clearly leads. FireMonkey starts at Free and Metasploit at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FireMonkey or Metasploit?
FireMonkey starts at Free and Metasploit at Free.
Does FireMonkey or Metasploit run on more platforms?
FireMonkey runs on Firefox. Metasploit runs on Desktop, Cli.
Can I use FireMonkey for free?
Both have a free tier, so you can try either at no cost before committing.
What is FireMonkey best used for?
FireMonkey is most often used for running user scripts and user styles without two separate extensions, restyling sites with css alongside scripted behaviour changes, editing scripts in a full editor inside the browser, injecting css globally across every site. Of those, running user scripts and user styles without two separate extensions and restyling sites with css alongside scripted behaviour changes are not what Metasploit is typically brought in for.
What can FireMonkey do that Metasploit cannot?
FireMonkey covers Scripts and styles together, Monaco editor with ESLint, Unlimited client-side storage, Global injection. Metasploit covers Exploit database, Payload generation, Post-exploitation, Evasion modules.

Answered from the vendors’ own pages

FireMonkey: What makes FireMonkey different from Violentmonkey?

It manages user styles as well as user scripts. The usual arrangement is a script manager plus a separate style manager such as Stylus; FireMonkey replaces both with one extension.

Source
Metasploit: Is Metasploit Framework free to use?

Yes, Metasploit Framework is available as free open-source software with source code accessible via GitHub. Community support is provided through Slack, GitHub, Twitter, and email.

Source
FireMonkey: Which browsers does FireMonkey support?

Firefox only. Desktop requires Firefox 93 or later and Android requires 113, with an API minimum of 102.

Source
Metasploit: What is the difference between Metasploit Framework and Metasploit Pro?

Metasploit Framework is the free open-source version. Metasploit Pro is a commercial offering with customer support from Rapid7, though specific pricing and features are not detailed on the download page.

Source
FireMonkey: Is FireMonkey open source?

Yes, under the MPL-2.0 licence.

Source
Metasploit: What support is available for the free Framework version?

Community-based support for Metasploit Framework is available through Slack, GitHub, Twitter, and email ([email protected]). Commercial customers using Metasploit Pro receive customer support from Rapid7.

Source
FireMonkey: Will my existing Tampermonkey scripts work?

Not necessarily. The project states that while it shares functionality with Greasemonkey, Tampermonkey and Stylus, there are differences, so scripts and styles written for those may need adjusting.

Source
FireMonkey: What editor does FireMonkey use?

Current versions use the Monaco editor with ESLint, the same editor component that powers VS Code.

Source
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