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Browser Extensions · head to head

FireMonkey vs Storybook

FireMonkey logo

FireMonkey

Browser Extensions

User scripts and user styles in one Firefox extension

From
Free
Rated
-
Full reviewWebsite
Storybook logo

Storybook

Technology

Build component driven UIs faster

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.; Storybook requires JavaScript framework knowledge for full utilization
  • They diverge on capability: FireMonkey covers Scripts and styles together, Storybook covers Component isolation.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which FireMonkey and Storybook actually diverge.

Attributes where FireMonkey and Storybook differ
AttributeFireMonkeyStorybook
Pricing modelopen-sourceUnknown
PlatformsFirefoxWeb, React Native, iOS, Android, Flutter
CategoryBrowser ExtensionsTechnology
FoundedUnknown2017

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 Storybook

  • Component isolation
  • Interactive development
  • Visual testing
  • Documentation generation
  • Accessibility testing
  • Interaction testing
  • Addons ecosystem
  • Hot module reloading

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 Storybook
  • Restyling sites with CSS alongside scripted behaviour changesnot Storybook
  • Editing scripts in a full editor inside the browsernot Storybook
  • Injecting CSS globally across every sitenot Storybook
  • Managing a mixed library of scripts and styles from one dashboardnot Storybook

Storybook

  • Component developmentnot FireMonkey
  • Design system documentationnot FireMonkey
  • Visual regression testingnot FireMonkey
  • UI component showcasenot FireMonkey
  • Team collaborationnot 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.

Storybook

  • Requires JavaScript framework knowledge for full utilization
  • Limited native support for non-web platforms compared to specialized tools

Pricing, plan by plan

FireMonkey

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

Storybook

Free

No published plan breakdown. See the Storybook review.

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 Storybook if

  • You need component isolation.
  • You want to start without paying.
  • You work on Web, React Native, iOS, Android, Flutter.
  • You also want interactive development.
Storybook review

Questions people ask

Is FireMonkey or Storybook better?
Neither clearly leads. FireMonkey starts at Free and Storybook at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FireMonkey or Storybook?
FireMonkey starts at Free and Storybook at Free.
Does FireMonkey or Storybook run on more platforms?
FireMonkey runs on Firefox. Storybook runs on Web, React Native, iOS, Android, Flutter.
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 Storybook is typically brought in for.
What can FireMonkey do that Storybook cannot?
FireMonkey covers Scripts and styles together, Monaco editor with ESLint, Unlimited client-side storage, Global injection. Storybook covers Component isolation, Interactive development, Visual testing, Documentation generation.

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
Storybook: Is Storybook free and open source?

Yes, Storybook is completely free and open source with source code hosted on GitHub. It has 2,282 contributors and approximately 83.58 million monthly installations.

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
Storybook: What frameworks does Storybook support?

Storybook integrates with React, Vue, Angular, Svelte, and has been extended to support React Native, Android, iOS, and Flutter for mobile development.

Source
FireMonkey: Is FireMonkey open source?

Yes, under the MPL-2.0 licence.

Source
Storybook: What are the main capabilities of Storybook?

Storybook enables component development in isolation, interaction testing, visual testing, documentation, and sharing components with designers and stakeholders.

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
Storybook: How is Storybook maintained?

Storybook is maintained by a community of 2,282 contributors. It originated from a startup called Kadira, was handed to the community in 2017, and has been community-driven since Storybook 3.0.

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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