An extension for designers and developers who care about the grid.

Baseliner promo image
What is Baseliner?

Baseliner is a Firefox add-on by jpedroribeiro. This add-on has 109 daily active users and a good user rating of 4.00. The latest version, 6.5.2, was updated 5 months ago.

Stats date:
Users: 109
Rating: 4.00 (4)
Version: 6.5.2 (Last updated: 2022-10-16)
Creation date: 2017-12-25
Weekly download count: NaN
Firefox on Android: No
Manifest version: 2
  • activeTab
  • storage
Size: 201.54K
URLs: Website
Risk impact: Very low risk impact
Risk likelihood: Moderate risk likelihood
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Other platforms

Not available on Chrome
Not available on Edge
This tool will add a layer on top of any website to be used as a guidance when developing interfaces. 

Both vertical and horizontal baselines are now supported (V6.0+).

For better experience, you can change the colour of the lines as well as the opacity, making it easier to compare the grid with your website design. 

The configuration you set for each URL is saved on localStorage, so you can go back later on and keep the grid as it was last time.

Developed by J. Pedro Ribeiro (@jpedroribeiro),  and constantly updated with support of the open source community.
Risk impact

Baseliner is safe to use. It does not request any sensitive permissions.

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

Baseliner is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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
I couldn't get this to work. The status was stuck on loading.
by sean, 2022-10-15
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