MetricRules!
PulseGate's liveness check found it on 12 Sep 2026; it is registered on GitHub and Firefox Add-ons and has been in the index since 12 Sep 2026. How this is checked
MetricRules! is a Firefox browser extension that detects imperial measurements on webpages and converts them to metric inline. It supports units including distance, weight, volume, speed, temperature, area, horsepower, and nautical miles, with Firefox for Android support.
Inferred · not functionally tested
Overview
6 featuresPurpose: Converting imperial measurements to metric while reading webpages.
Inferred · not functionally tested
Audience: Firefox users who read content using imperial measurements
Inferred · not functionally tested
Functions: Unknown
Interfaces: API: unknown · MCP: unknown · CLI: unknown · Self-hosting: unknown
Recorded constraints: pricing: free · license: MIT · platforms: WEB · deployment: browser, embeddable, android
Constraint provenance is unknown; confirm requirements with the publisher.
Record sources: addons.mozilla.org · github.com · addons.mozilla.org. These links do not verify the individual claims.
In the Browser DevTools & extensions space, MetricRules! takes a focused approach. Inferred · not functionally tested: It focuses on converting imperial measurements to metric while reading webpages. Inferred · not functionally tested: It is built as a consumer product for firefox users who read content using imperial measurements. Basis unknown · not verified: MetricRules! is free to use. Basis unknown · not verified: It runs on the web, embeddable surfaces, and Android.
Behind MetricRules! is SpitFire-666, and it first shipped in 2015. The GitHub repository has been archived. Inferred · not functionally tested: Key capabilities include inline conversion, distance conversion, and weight conversion. 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
- Inline conversion
- Distance conversion
- Weight conversion
- Volume conversion
- Speed conversion
- Temperature conversion
Topics: Inferred · not functionally tested
Built with & integrations
Trust & compliance
Indexing history
1What PulseGate has recorded for this listing
Frequently asked questions about MetricRules!
- What is MetricRules!?
- Inferred · not functionally tested: MetricRules! focuses on converting imperial measurements to metric while reading webpages. It is catalogued under Browser DevTools & extensions on PulseGate.
- Who should use MetricRules!?
- Inferred · not functionally tested: MetricRules! is a consumer product built for firefox users who read content using imperial measurements.
- Is MetricRules! free?
- Basis unknown · not verified: Yes — MetricRules! is free to use.
- What platforms does MetricRules! run on?
- Basis unknown · not verified: MetricRules! runs on the web, embeddable surfaces, and Android.
- Is MetricRules! still active?
- PulseGate's liveness check found it on 12 Sep 2026.
- What are alternatives to MetricRules!?
- Similar projects tracked by PulseGate include Everything Metric, Metric Unit Converter & Search, and Metrication Browser Add-On.Everything MetricMetric Unit Converter & SearchMetrication Browser Add-On
- Who develops MetricRules!?
- MetricRules! is developed by SpitFire-666.
- How long has MetricRules! been around?
- MetricRules! first shipped in 2015.
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