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Browser Extensions · head to head

Greasemonkey vs Vue.js Devtools

Greasemonkey logo

Greasemonkey

Browser Extensions

The original userscript manager, for Firefox

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: Greasemonkey firefox only. There is no Chrome, Edge or Safari build and there never has been.; Vue.js Devtools primarily a developer debugging tool, not intended for production use
  • They diverge on capability: Greasemonkey covers Userscript execution, 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 Greasemonkey and Vue.js Devtools actually diverge.

Attributes where Greasemonkey and Vue.js Devtools differ
AttributeGreasemonkeyVue.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 Greasemonkey

  • Userscript execution
  • Built-in script editor
  • GM. API
  • @resource support
  • Script localisation
  • 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.

Greasemonkey

  • Restyling or de-cluttering a site you use dailynot Vue.js Devtools
  • Automating a repetitive action on a web applicationnot Vue.js Devtools
  • Adding a missing feature to a site you do not controlnot Vue.js Devtools
  • Running userscripts on Firefox for Androidnot Vue.js Devtools
  • Writing and testing your own scripts in the browsernot Vue.js Devtools

Vue.js Devtools

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

Where each one falls short

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

Greasemonkey

  • Firefox only. There is no Chrome, Edge or Safari build and there never has been.
  • Its API diverged from the Tampermonkey conventions most shared scripts are written against, so a script from a sharing site may need adjusting to run.
  • The dashboard is plainer than Tampermonkey's, with no diff view when a script updates itself.
  • No cloud sync of the kind Tampermonkey and Violentmonkey offer; moving machines means exporting.
  • A userscript manager can read and rewrite every page you visit, so the security of the arrangement depends entirely on the scripts you choose to install.

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

Greasemonkey

Free
  • Open sourceFree
    • Unlimited scripts
    • Built-in editor
    • No account required

Vue.js Devtools

Free

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

Which should you pick?

Choose Greasemonkey if

  • You need userscript execution.
  • You want to start without paying.
  • You work on Firefox.
  • You also want built-in script editor.
Greasemonkey 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 Greasemonkey or Vue.js Devtools better?
Neither clearly leads. Greasemonkey 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, Greasemonkey or Vue.js Devtools?
Greasemonkey starts at Free and Vue.js Devtools at Free.
Does Greasemonkey or Vue.js Devtools run on more platforms?
Greasemonkey runs on Firefox. Vue.js Devtools runs on Browser extensions, Vite plugin, Standalone app.
Can I use Greasemonkey for free?
Both have a free tier, so you can try either at no cost before committing.
What is Greasemonkey best used for?
Greasemonkey is most often used for restyling or de-cluttering a site you use daily, automating a repetitive action on a web application, adding a missing feature to a site you do not control, running userscripts on firefox for android. Of those, restyling or de-cluttering a site you use daily and automating a repetitive action on a web application are not what Vue.js Devtools is typically brought in for.
What can Greasemonkey do that Vue.js Devtools cannot?
Greasemonkey covers Userscript execution, Built-in script editor, GM. API, @resource support. Vue.js Devtools covers Component tree, Vuex state, Vue Router, Performance timeline.

Answered from the vendors’ own pages

Greasemonkey: Is Greasemonkey still maintained?

Yes. Version 4.14 was released on 2 June 2026, and the project has an active repository, bug tracker and discussion groups.

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
Greasemonkey: Does Greasemonkey work on Chrome?

No. It is a Firefox extension and has never shipped for Chrome. Violentmonkey and Tampermonkey are the equivalents there.

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
Greasemonkey: Will Tampermonkey scripts run in Greasemonkey?

Often, but not always. Greasemonkey's API diverged from the conventions most shared scripts are written against, so a script may need its header or its GM calls adjusted.

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
Greasemonkey: Does Greasemonkey run on mobile?

On Firefox for Android, from version 4.12. There is no iOS build, because Firefox on iOS cannot load extensions of this kind.

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
Greasemonkey: What is the GM API?

The set of functions a userscript manager exposes to scripts, named after Greasemonkey, which defined it. Greasemonkey supports the promise-based GM. form including GM.xmlHttpRequest and GM.registerMenuCommand.

Source
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