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Browser Extensions · head to head

FireMonkey vs Ory

FireMonkey logo

FireMonkey

Browser Extensions

User scripts and user styles in one Firefox extension

From
Free
Rated
-
Full reviewWebsite
Ory logo

Ory

Cybersecurity

Open-source identity, authentication, and permissions infrastructure

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.; Ory production and Growth plans are billed annually ($770/year and $9,350/year), which is a larger upfront commitment than monthly-only competitors.
  • They diverge on capability: FireMonkey covers Scripts and styles together, Ory covers Authentication APIs.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which FireMonkey and Ory actually diverge.

Attributes where FireMonkey and Ory differ
AttributeFireMonkeyOry
Pricing modelopen-sourceusage-based
PlatformsFirefoxweb, api
CategoryBrowser ExtensionsCybersecurity

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 Ory

  • Authentication APIs
  • Permissions engine
  • Machine-to-machine tokens
  • B2B organizations
  • SAML SSO
  • Multi-region deployments

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

Ory

  • Adding self-hosted or cloud identity to a new productnot FireMonkey
  • Implementing fine-grained permission checksnot FireMonkey
  • Supporting B2B organizations and multi-tenancynot FireMonkey
  • Building machine-to-machine authentication for microservicesnot 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.

Ory

  • Production and Growth plans are billed annually ($770/year and $9,350/year), which is a larger upfront commitment than monthly-only competitors.
  • SAML SSO and multi-region deployments are reserved for the custom-priced Enterprise tier.
  • Usage-based pricing across aDAU, M2M tokens, and permission checks makes cost estimation more complex than flat per-MAU billing.

Pricing, plan by plan

FireMonkey

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

Ory

Free
  • DeveloperFree
    • Community support
    • No production environments
  • Production$64/month
    • $21 monthly credit included
    • 1 production environment
    • 3 staging environments
  • Growth$779/month
    • $255 monthly credit included
    • 2 production environments
    • B2B organizations (max 3)

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 Ory if

  • You need authentication apis.
  • You want to start without paying.
  • You work on web, api.
  • You also want permissions engine.
Ory review

Questions people ask

Is FireMonkey or Ory better?
Neither clearly leads. FireMonkey starts at Free and Ory at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FireMonkey or Ory?
FireMonkey starts at Free and Ory at Free.
Does FireMonkey or Ory run on more platforms?
FireMonkey runs on Firefox. Ory runs on web, api.
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 Ory is typically brought in for.
What can FireMonkey do that Ory cannot?
FireMonkey covers Scripts and styles together, Monaco editor with ESLint, Unlimited client-side storage, Global injection. Ory covers Authentication APIs, Permissions engine, Machine-to-machine tokens, B2B organizations.

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
Ory: What does Ory cost?

Ory has a free Developer tier, a Production plan at $770/year including a $21 monthly credit, a Growth plan at $9,350/year including a $255 monthly credit, and custom Enterprise pricing.

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
Ory: How is usage metered?

Beyond the included credit, Ory charges per average daily active user (aDAU), per machine-to-machine token, and per permission check, with lower per-unit rates on the Growth plan.

Source
FireMonkey: Is FireMonkey open source?

Yes, under the MPL-2.0 licence.

Source
Ory: What payment methods are supported?

Ory accepts credit cards (Visa, MasterCard, Amex) and bank transfer, processed via Stripe.

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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