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Browser Extensions · head to head

FireMonkey vs Vue.js Devtools

FireMonkey logo

FireMonkey

Browser Extensions

User scripts and user styles in one Firefox extension

From
Free
Rated
-
Full reviewWebsite
Vue.js Devtools logo

Vue.js Devtools

Browser Extensions

Browser DevTools extension for debugging Vue.js

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.; Vue.js Devtools primarily a developer debugging tool, not intended for production use
  • They diverge on capability: FireMonkey covers Scripts and styles together, Vue.js Devtools covers Component tree.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which FireMonkey and Vue.js Devtools actually diverge.

Attributes where FireMonkey and Vue.js Devtools differ
AttributeFireMonkeyVue.js Devtools
Pricing modelopen-sourceUnknown
PlatformsFirefoxBrowser extensions, Vite plugin, Standalone app
FoundedUnknown2014

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

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 Vue.js Devtools

  • Component tree
  • Vuex state
  • Vue Router
  • Performance timeline
  • Chrome support
  • Firefox support
  • Edge support

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

Vue.js Devtools

  • Vue.js component hierarchy inspectionnot FireMonkey
  • Application state debuggingnot FireMonkey
  • Component relationship visualizationnot 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.

Vue.js Devtools

  • Primarily a developer debugging tool, not intended for production use
  • Limited to browser extension format for most users; requires Vite plugin or standalone app for alternative use

Pricing, plan by plan

FireMonkey

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

Vue.js Devtools

Free

No published plan breakdown. See the Vue.js Devtools 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 Vue.js Devtools if

  • You need component tree.
  • You want to start without paying.
  • You work on Browser extensions, Vite plugin, Standalone app.
  • You also want vuex state.
Vue.js Devtools review

Questions people ask

Is FireMonkey or Vue.js Devtools better?
Neither clearly leads. FireMonkey starts at Free and Vue.js Devtools at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FireMonkey or Vue.js Devtools?
FireMonkey starts at Free and Vue.js Devtools at Free.
Does FireMonkey or Vue.js Devtools run on more platforms?
FireMonkey runs on Firefox. Vue.js Devtools runs on Browser extensions, Vite plugin, Standalone app.
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 Vue.js Devtools is typically brought in for.
What can FireMonkey do that Vue.js Devtools cannot?
FireMonkey covers Scripts and styles together, Monaco editor with ESLint, Unlimited client-side storage, Global injection. Vue.js Devtools covers Component tree, Vuex state, Vue Router, Performance timeline.

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
Vue.js Devtools: How is Vue.js licensed?

Vue.js is licensed under the MIT License, which permits commercial use, modification, distribution, and private use without restrictions.

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
Vue.js Devtools: Can I use Vue.js commercially?

Yes. Vue.js is MIT-licensed open source software with no commercial use restrictions. You can use it freely in commercial products.

Source
FireMonkey: Is FireMonkey open source?

Yes, under the MPL-2.0 licence.

Source
Vue.js Devtools: What support options are available for Vue.js?

Vue.js offers free community support through Discord, GitHub Discussions, and DEV Community. Paid learning resources include Vue Mastery and Vue School, plus official Vue.js Certification is available.

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
Vue.js Devtools: How does Vue.js sustain development?

Vue.js is sustained through optional sponsorships at Platinum and Gold tiers, and ancillary commercial services including training, certification, and a jobs board.

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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