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Composition Grid

mozilla.orgBrowser DevTools & extensions

PulseGate's liveness check found it on 16 Sep 2026; it is registered on Firefox Add-ons and has been in the index since 16 Sep 2026. How this is checked

Composition Grid is a Firefox browser extension that overlays visual composition guides on any webpage. Users can switch between rule-of-thirds and golden-ratio grids to analyze layouts and visual balance.

Inferred · not functionally tested

FreeWebEmbeddable
Composition Grid preview
Visit mozilla.org

Overview

4 features

Purpose: Analyzing webpage visual layouts without manually estimating composition guides.

Inferred · not functionally tested

Audience: designers, product managers, and developers

Inferred · not functionally tested

Functions: Unknown

Interfaces: API: unknown · MCP: unknown · CLI: unknown · Self-hosting: unknown

Recorded constraints: pricing: free · license: Proprietary · platforms: WEB · deployment: browser, embeddable

Constraint provenance is unknown; confirm requirements with the publisher.

Record sources: addons.mozilla.org · addons.mozilla.org. These links do not verify the individual claims.

Composition Grid sits in PulseGate's Browser DevTools & extensions category. Inferred · not functionally tested: It focuses on analyzing webpage visual layouts without manually estimating composition guides. Inferred · not functionally tested: It is built as a consumer product for designers, product managers, and developers. Basis unknown · not verified: Composition Grid costs nothing to use. Basis unknown · not verified: It runs on the web and embeddable surfaces.

Behind Composition Grid is rrmn, and it first shipped in 2024. Inferred · not functionally tested: Key capabilities include rule-of-thirds grid, golden-ratio grid, and webpage overlay. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Tasks: Inferred · not functionally tested

  • Rule-of-thirds grid
  • Golden-ratio grid
  • Webpage overlay
  • Grid toggle

Topics: Inferred · not functionally tested

Tags
composition-guidesrule-of-thirdsgolden-ratioweb-layout-analysis

JSON profile · Text profile · Access guide

Built with & integrations

Runs on
BrowserEmbeddable

Trust & compliance

Public signals
HTTPSPrivacy PolicyTerms of ServiceFree tierMulti-languageStore listing found
Legal
Privacy Policy Terms of Service

Indexing history

1

What PulseGate has recorded for this listing

  1. Indexed16 Sep · 18:02 UTC
    Composition Grid seen via Firefox Add-ons
    Source: Firefox Add-ons · Open

Frequently asked questions about Composition Grid

What is Composition Grid?
Inferred · not functionally tested: Composition Grid focuses on analyzing webpage visual layouts without manually estimating composition guides. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Composition Grid?
Inferred · not functionally tested: Composition Grid is a consumer product built for designers, product managers, and developers.
Does Composition Grid have a free plan?
Basis unknown · not verified: Yes — Composition Grid is free to use.
What platforms does Composition Grid run on?
Basis unknown · not verified: Composition Grid runs on the web and embeddable surfaces.
Is Composition Grid still active?
PulseGate's liveness check found it on 16 Sep 2026.
What are alternatives to Composition Grid?
Similar projects tracked by PulseGate include Composition Grid, Grid Overlay, and Grid and Layout Overlay.Composition GridGrid OverlayGrid and Layout Overlay
Who develops Composition Grid?
Composition Grid is developed by rrmn.
When did Composition Grid launch?
Composition Grid first shipped in 2024.

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