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Browser Extensions · head to head

FireMonkey vs Plane

FireMonkey logo

FireMonkey

Browser Extensions

User scripts and user styles in one Firefox extension

From
Free
Rated
-
Full reviewWebsite
Plane logo

Plane

Technology

Open-source project management tool

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.; Plane self-hosted Community edition requires managing your own Docker/Kubernetes infra plus your own PostgreSQL, Redis, and S3-compatible/GCS/MinIO storage; no single-binary install
  • They diverge on capability: FireMonkey covers Scripts and styles together, Plane covers Issue tracking.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which FireMonkey and Plane actually diverge.

Attributes where FireMonkey and Plane differ
AttributeFireMonkeyPlane
Pricing modelopen-sourcefreemium
PlatformsFirefoxWeb, iOS, Android, macOS, Windows
CategoryBrowser ExtensionsTechnology
FoundedUnknown2022

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 Plane

  • Issue tracking
  • Cycles (Sprints)
  • Modules
  • Views & layouts
  • Pages (Docs)
  • Analytics
  • API access
  • Webhooks

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

Plane

  • Project and task management with cycles, modules, epics, and initiativesnot FireMonkey
  • Documentation and knowledge management via workspace wiki tied to project worknot FireMonkey
  • Sprint planning and issue triagenot FireMonkey
  • Cross-functional collaboration with analytics and dashboardsnot FireMonkey
  • Migration target from Jira, Linear, Monday, ClickUp, or Asananot 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.

Plane

  • Self-hosted Community edition requires managing your own Docker/Kubernetes infra plus your own PostgreSQL, Redis, and S3-compatible/GCS/MinIO storage; no single-binary install
  • Cloud Free tier caps at 12 users and 500 AI credits per seat per month
  • Substantial feature gating by tier: custom work item types, workspace wiki, time tracking, dashboards, initiatives, teamspaces, and integrations require Pro or above; LDAP, granular access control, and multi-workflow approvals require Enterprise Grid
  • Guest-to-paid-member ratio capped at 1:5 on the Pro plan

Pricing, plan by plan

FireMonkey

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

Plane

Free
  • FreeFree
    • 500 AI credits per seat
    • Max 12 users
    • Unlimited projects
  • Pro$6/seat per month
    • 1,000 AI credits per seat
    • Unlimited users
    • Custom work item types
  • Business$13/seat per month
    • 2,000 AI credits per seat
    • Unlimited users
    • Project templates, recurring work items
  • Enterprise Grid$null/mo
    • Flexible AI credit allocation
    • Private deployments
    • Granular access control

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 Plane if

  • You need issue tracking.
  • You want to start without paying.
  • You work on Web, iOS, Android, macOS, Windows.
  • You also want cycles (sprints).
Plane review

Questions people ask

Is FireMonkey or Plane better?
Neither clearly leads. FireMonkey starts at Free and Plane at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FireMonkey or Plane?
FireMonkey starts at Free and Plane at Free.
Does FireMonkey or Plane run on more platforms?
FireMonkey runs on Firefox. Plane runs on Web, iOS, Android, macOS, Windows.
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 Plane is typically brought in for.
What can FireMonkey do that Plane cannot?
FireMonkey covers Scripts and styles together, Monaco editor with ESLint, Unlimited client-side storage, Global injection. Plane covers Issue tracking, Cycles (Sprints), Modules, Views & layouts.

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
Plane: Does Plane offer a free plan?

Yes, Plane's free tier includes 500 AI credits per seat, support for up to 12 users, and access to projects, work items, cycles, modules, layouts, views, estimates, and pages.

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
Plane: How much does Plane Pro cost?

Plane Pro costs $6/seat per month and saves 25% when billed annually. It includes 1,000 AI credits per seat, unlimited users, and access to custom work item types, wiki, time tracking, and integrations.

Source
FireMonkey: Is FireMonkey open source?

Yes, under the MPL-2.0 licence.

Source
Plane: What is the difference between Plane's paid tiers?

Pro ($6/seat/month) includes 1,000 AI credits and workspace wiki. Business ($13/seat/month) adds 2,000 AI credits, project templates, and recurring work items. Enterprise Grid offers custom pricing with multiple workflows and LDAP support.

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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