Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Measure-it: Firefox Add-on for Webpage Dimension Inspection
"Measure-it" is a fast and simple Firefox add-on that allows users to accurately measure the dimensions of elements on any webpage in pixels. With customizable UI and keyboard shortcuts, users can easily draw a ruler across any webpage to check the width, height or alignment of its elements. Please note that this may not work on addons.mozilla.org.
Add-on stats
By: Trishul
Rating: 4.41
1 new ratings
(124)
Weekly download count: 378
Firefox on Android: No
Manifest version: 2
Permissions:
- activeTab
- storage
Size: 27.16K
Email: tr*****@gmail.com
URLs: Website
Ranking
# 447 ▼ 3
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Add-on summary
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
Keyboard shortcuts Mac - Command+Shift+O Windows/Linux - Alt+Shift+M This can be changed from Add-on preferences. Features
- Fast
- Simple
- Customizable UI/shortcuts from preferences
User reviews
Pros
- Super useful
- Interesting and convenient addon
- Runs technically flawless
- First class tool for measurements
Cons
- Added spam to email address
- Did not work as expected, causing frustration
- Rectangle created cannot be moved
Most mentioned
- Does not function as expected
- Causes spam-related issues
- User-friendly for measuring needs
User reviews
by 天灭中共退党团队保平安, 2025-02-13
This has added spam to my email address, and I hate it.
by Barry, 2025-01-17
Super useful!
by ZayneH, 2024-11-17
Add-on safety
Risk impact
Measure-it does not require any sensitive permissions.
Risk impact analysis details
- Low Request access to the following domains:
Risk likelihood
We don't have sufficient data to confidently determine the risk likelihood of Measure-it. Use it at your own risk.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
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