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Features & Capabilities
User Growth & Download Statistics
- By:
- SpitFire-666
- Daily users:
- 66 -1
- Rating:
- 4.14 (7)
- Version:
- 0.5 Last updated: 2026-03-03
- Version code:
- 6167674
- Creation date:
- 2024-08-01
- Risk:
- Moderate risk impact Moderate risk likelihood
- Content scripts matches:
- *
- *
- Size:
- 46.51KB
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-03
- Compare stats and ranking:
- MetricRules! vs MetricRules!
- MetricRules! vs Everything Metric (Auto Unit Converter)
- MetricRules! vs Metrication
For Developers
Contact the developer
Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
User Reviews
Edit: also breaks StartPage layout for some reason. Author should have a github repo active so people can communicate on these issues more easily.
Advantage over the current most popular autoconverter: decimal separation uses "." instead of ",". Both are valid but international scientific writing uses "." - of course an option to customize the separator would be even better.
Current misgivings (without repeating other reviews): cannot do range (e.g., for 1.8-2.5 miles the result only converts 2.5 miles); the EU flag is fun but will get cluttered on page with a lot of converted units. Not to mention that it feels exclusionary when the rest of the world also use metric.
by Dr*****, 2026-01-21
Access your data for all websites
by Kh*****, 2025-11-26
Works great and saves from a lot of headache.
Does not work if something is written like “28k miles”.
Also inches sometimes are written like “10"”, then it also does not work.
Works on mobile firefox btw
by Fi*****, 2025-04-22
Is MetricRules! Safe?
Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.
MetricRules! requires a few sensitive permissions. Exercise caution before installing.
Risk impact analysis details
- Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.
MetricRules! is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
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