Dev Mode Firefox

Dev Mode

By: D7OM
A simple helper extension for developers working on localhost environments.

Features & Capabilities

DevMode

A simple Firefox extension designed for developers working on localhost environments. It adds a developer toolbar with helpful features like a viewport border, grid overlay, FPS counter, and local storage viewer.

Features

Viewport Border: Adds a border around the viewport to differentiate between dev tabs and non-dev tabs. Grid Overlay: Display a grid overlay for alignment. FPS Counter: Shows real-time FPS with color changes (green to red) based on performance. Local Storage Viewer: View local storage data in a formatted JSON view.

User Growth & Download Statistics

Manifest V2 Add-on
By:
D7OM
Daily users:
8
Version:
1.0.1 Last updated: 2025-03-08
Version code:
5906085
Creation date:
2025-03-06
Risk:
Low risk impact Moderate risk likelihood
Permissions:
Content scripts matches:
  • localhost
  • 127.0.0.1
Size:
451.73KB
Email:
he*****@d7om.dev
URLs:
Website
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-15
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
D7OM
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/dev-mode/
Email:
he*****@d7om.dev
Website:
https://github.com/d7omdev/devmode/issues/new

Is Dev Mode 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.

Dev Mode requires very minimum permissions.

Risk impact analysis details
  • High Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
  • Low ******* ****** ** *** ********* ******** ********** ***
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.

Dev Mode 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 **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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Best Dev Mode Alternatives

Here are some Firefox add-ons that are similar to Dev Mode: