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Browser Extensions · head to head

AdBlock Plus vs FireMonkey

AdBlock Plus logo

AdBlock Plus

Browser Extensions

The world's most popular ad blocker

From
Free
Rated
-
Full reviewWebsite
FireMonkey logo

FireMonkey

Browser Extensions

User scripts and user styles in one Firefox extension

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: AdBlock Plus acceptable Ads allowlist model generates controversy over ad filtering conflicts of interest; FireMonkey firefox only, and requires a recent one: version 93 on desktop, 113 on Android.
  • They diverge on capability: AdBlock Plus covers Ad blocking, FireMonkey covers Scripts and styles together.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which AdBlock Plus and FireMonkey actually diverge.

Attributes where AdBlock Plus and FireMonkey differ
AttributeAdBlock PlusFireMonkey
Pricing modelfreeopen-source
PlatformsChrome, Edge, Firefox, Opera, Safari, Yandex BrowserFirefox
Founded2006Unknown

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 AdBlock Plus

  • Ad blocking
  • Acceptable Ads
  • Custom filters
  • Social media blocking
  • Chrome support
  • Firefox support
  • Edge support
  • Safari support

Only in FireMonkey

  • Scripts and styles together
  • Monaco editor with ESLint
  • Unlimited client-side storage
  • Global injection
  • Notifications and clipboard
  • Firefox for Android

What people use each for

The jobs each tool is most often brought in to do.

AdBlock Plus

  • Ad blocking for display ads, video advertisements including YouTube pre-roll/mid-roll/post-roll, pop-ups, flashing banners, and overlay adsnot FireMonkey
  • Performance enhancement by eliminating ad content to accelerate page load times and reduce data and battery consumption on mobile devicesnot FireMonkey
  • Security and privacy protection by blocking malware-infected ads (malvertising), preventing tracking by companies monitoring user behavior, and stopping access to malware-distributing sitesnot FireMonkey
  • Supports web browsers including Chrome, Firefox, Edge, Opera, and Safari, as well as iOS Safari and Android devicesnot FireMonkey

FireMonkey

  • Running user scripts and user styles without two separate extensionsnot AdBlock Plus
  • Restyling sites with CSS alongside scripted behaviour changesnot AdBlock Plus
  • Editing scripts in a full editor inside the browsernot AdBlock Plus
  • Injecting CSS globally across every sitenot AdBlock Plus
  • Managing a mixed library of scripts and styles from one dashboardnot AdBlock Plus

Where each one falls short

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

AdBlock Plus

  • Acceptable Ads allowlist model generates controversy over ad filtering conflicts of interest
  • Smaller feature set compared to open-source alternatives like uBlock Origin
  • Less customization and dynamic filtering compared to uBlock Origin
  • Mobile version less comprehensive than desktop extension
  • Chrome version increasingly limited due to Manifest V3 migration

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.

Pricing, plan by plan

AdBlock Plus

Free
  • FreeFree
    • Ad blocking
    • Acceptable Ads option
    • Custom filters

FireMonkey

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

Which should you pick?

Choose AdBlock Plus if

  • You need ad blocking.
  • You want to start without paying.
  • You work on Chrome, Edge, Firefox, Opera, Safari, Yandex Browser.
  • You also want acceptable ads.
AdBlock Plus review

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

Questions people ask

Is AdBlock Plus or FireMonkey better?
Neither clearly leads. AdBlock Plus starts at Free and FireMonkey at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, AdBlock Plus or FireMonkey?
AdBlock Plus starts at Free and FireMonkey at Free.
Does AdBlock Plus or FireMonkey run on more platforms?
AdBlock Plus runs on Chrome, Edge, Firefox, Opera, Safari, Yandex Browser. FireMonkey runs on Firefox.
Can I use AdBlock Plus for free?
Both have a free tier, so you can try either at no cost before committing.
What is AdBlock Plus best used for?
AdBlock Plus is most often used for ad blocking for display ads, video advertisements including youtube pre-roll/mid-roll/post-roll, pop-ups, flashing banners, and overlay ads, performance enhancement by eliminating ad content to accelerate page load times and reduce data and battery consumption on mobile devices, security and privacy protection by blocking malware-infected ads (malvertising), preventing tracking by companies monitoring user behavior, and stopping access to malware-distributing sites, supports web browsers including chrome, firefox, edge, opera, and safari, as well as ios safari and android devices. Of those, ad blocking for display ads, video advertisements including youtube pre-roll/mid-roll/post-roll, pop-ups, flashing banners, and overlay ads and performance enhancement by eliminating ad content to accelerate page load times and reduce data and battery consumption on mobile devices are not what FireMonkey is typically brought in for.
What can AdBlock Plus do that FireMonkey cannot?
AdBlock Plus covers Ad blocking, Acceptable Ads, Custom filters, Social media blocking. FireMonkey covers Scripts and styles together, Monaco editor with ESLint, Unlimited client-side storage, Global injection.

Answered from the vendors’ own pages

AdBlock Plus: What does Adblock Plus block?

Adblock Plus blocks banner ads, pre-roll and mid-roll video ads on YouTube, pop-ups, sidebar ads, and most standard display formats. With Acceptable Ads disabled and EasyPrivacy enabled, it achieved a 100/100 score on AdBlock Tester in April 2026.

Source
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
AdBlock Plus: What browsers does Adblock Plus support?

Adblock Plus is available for Chrome, Edge, Firefox, Opera, Safari, and Yandex Browser.

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
AdBlock Plus: Is there a premium version of Adblock Plus?

Yes. Adblock Plus Premium costs $40 annually or $4 per month and allows users to block cookie consent pop-ups, while the free version includes core ad blocking.

Source
FireMonkey: Is FireMonkey open source?

Yes, under the MPL-2.0 licence.

Source
AdBlock Plus: What is Acceptable Ads?

Acceptable Ads is an opt-in setting that allows advertising Adblock Plus deems unobtrusive to display on websites; it is disabled by default but can be toggled in Settings.

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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