A mobile browser emulator for testing the responsiveness of web pages on various mobile screen sizes and orientations.

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What is Mobrem?

Mobrem is a Firefox add-on by Celsoppe. This add-on has 86 daily active users and a perfect 5.0 rating. The latest version, 1.5.3, was updated 3 years ago.

Stats date:
Users: 86 ▼ -1
Rating: 5.00 (4)
Version: 1.5.3 (Last updated: 2020-04-05)
Creation date: 2020-03-21
Weekly download count: 7
Firefox on Android: No
Manifest version: 2
  • activeTab
  • storage
Size: 111.31K
Email: Click to see
URLs: Website
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
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Other platforms

Not available on Chrome
Not available on Edge
Mobrem enhances developer experience by emulating mobile browsers, enabling mostly developers to efficiently test their web pages on various screen sizes, including the portrait and landscape orientations.
Risk impact

Mobrem requires a number of risky permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Mobrem if you trust the publisher.

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, bypass your security settings, and access your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Risk likelihood

Mobrem has earned a fairly good reputation and likely can be trusted.

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 Browser Add-ons, 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, especially ones with higher risk impact and/or higher risk likelihood.

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User reviews
by Kostia, 2022-09-23
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