Baseliner
An extension for designers and developers who care about the grid.
Baseliner: Firefox Add-on for Grid Guidance
Baseliner is a Firefox add-on that adds a layer on top of any website, serving as a guidance tool for designers and developers. It supports vertical and horizontal baselines, with customizable colors and opacity. Configuration is saved for each URL, allowing easy access to previously set grids. Developed and supported by J. Pedro Ribeiro and the open source community.
Add-on stats
Weekly download count: 1
Firefox on Android: No
Risk impact: Very low risk impact 
Risk likelihood:
Manifest version: 3
Permissions:
- activeTab
- storage
- scripting
Size: 216.28K
URLs: Website
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Add-on summary
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.
User reviews
Does exactly what i needed... nothing more and nothing less... 5 stars
by Dominik, 2023-11-04
Add-on safety
Risk impact
Baseliner does not require any sensitive permissions.
Risk likelihood
Baseliner is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.
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