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Browser Extensions · head to head

Greasemonkey vs Nimbus Screenshot

Greasemonkey logo

Greasemonkey

Browser Extensions

The original userscript manager, for Firefox

From
Free
Rated
-
Full reviewWebsite
Nimbus Screenshot logo

Nimbus Screenshot

Browser Extensions

Screen capture and video recording

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.; Nimbus Screenshot nimbus Web has rebranded to FuseBase; nimbusweb.me now redirects to thefusebase.com, and the screenshot tool sits inside a broader client portal and AI workspace product
  • They diverge on capability: Greasemonkey covers Userscript execution, Nimbus Screenshot covers Full page capture.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which Greasemonkey and Nimbus Screenshot actually diverge.

Attributes where Greasemonkey and Nimbus Screenshot differ
AttributeGreasemonkeyNimbus Screenshot
Pricing modelopen-sourcefreemium
PlatformsFirefoxChrome, Firefox, Edge, Opera
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 Nimbus Screenshot

  • Full page capture
  • Area selection
  • Annotation tools
  • Video recording
  • Chrome support
  • Firefox support
  • Edge support
  • Opera 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 Nimbus Screenshot
  • Automating a repetitive action on a web applicationnot Nimbus Screenshot
  • Adding a missing feature to a site you do not controlnot Nimbus Screenshot
  • Running userscripts on Firefox for Androidnot Nimbus Screenshot
  • Writing and testing your own scripts in the browsernot Nimbus Screenshot

Nimbus Screenshot

  • Capturing full page and partial browser screenshotsnot Greasemonkey
  • Recording screen video from a browser tabnot Greasemonkey
  • Annotating captures before sharing themnot 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.

Nimbus Screenshot

  • Nimbus Web has rebranded to FuseBase; nimbusweb.me now redirects to thefusebase.com, and the screenshot tool sits inside a broader client portal and AI workspace product
  • No Nimbus-branded pricing, plan or storage limit remains published at the original domain
  • The destination product is positioned around client portals, AI agents and project management rather than a standalone screenshot extension

Pricing, plan by plan

Greasemonkey

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

Nimbus Screenshot

Free
  • FreeFree
    • Screenshot capture
    • Basic annotation
    • Cloud storage

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 Nimbus Screenshot if

  • You need full page capture.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge, Opera.
  • You also want area selection.
Nimbus Screenshot review

Questions people ask

Is Greasemonkey or Nimbus Screenshot better?
Neither clearly leads. Greasemonkey starts at Free and Nimbus Screenshot at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Greasemonkey or Nimbus Screenshot?
Greasemonkey starts at Free and Nimbus Screenshot at Free.
Does Greasemonkey or Nimbus Screenshot run on more platforms?
Greasemonkey runs on Firefox. Nimbus Screenshot runs on Chrome, Firefox, Edge, Opera.
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 Nimbus Screenshot is typically brought in for.
What can Greasemonkey do that Nimbus Screenshot cannot?
Greasemonkey covers Userscript execution, Built-in script editor, GM. API, @resource support. Nimbus Screenshot covers Full page capture, Area selection, Annotation tools, Video recording.

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
Nimbus Screenshot: What is the pricing for FuseBase's Solo plan?

The Solo plan is free to start, includes a 14-day trial, and provides 1,000 AI requests, 1 portal, 1 client, 1,000 automation runs, and 5 hours of transcriptions per month.

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
Nimbus Screenshot: What tiers does FuseBase offer?

FuseBase offers Solo (free), Essentials, Advanced (most popular), and Unlimited (custom pricing) plans. All paid plans include a 14-day free trial.

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
Nimbus Screenshot: What do I get with FuseBase's Advanced plan?

The Advanced plan includes 50,000 AI requests, 100 portals (or unlimited with contact), 1,000 clients, 50,000 automation runs, 300 hours of transcriptions, granular permissions, and white-label capability. Exact pricing requires checking or contacting for current rates.

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
Nimbus Screenshot: Can I pay annually for FuseBase and get a discount?

Yes. FuseBase offers annual billing options with discounts compared to monthly payments. Upgrades charge immediately while downgrades apply at the end of your billing cycle.

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
Nimbus Screenshot: What add-ons are available for FuseBase?

FuseBase offers paid add-ons including extra automation runs (1,000/month), additional client portals, transcription hours (20/month), and per-user FuseBase AI costs.

Source
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