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Dev tools · August 24, 2024

Firebuilder: A complete Firefox customization tool

Hi HN! I've been working lately on unifying firefox configuration. Many people work on creating custom `userChrome.css` files and modules, browser user scripts, etc, but it's hard to actually use these a lot of the time. It usually involves cloning a repo, finding a folder and lots of copy paste. My tool (firebuilder) has an interactive CLI to select what to apply, (e.g. firefox hardening, custom CSS, etc) then creates a brand new profile folder for you. You can also seamlessly port from an existing profile folder to preserve all of your history, bookmarks, extensions, etc. For those more…

Firebuilder: A complete Firefox customization tool launched on August 24, 2024 with 143 votes, #412 of 5,471 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 2 years on.

Visit github.com ↗Alternativestop 8% of August 2024

In plain words

Firebuilder is a command-line tool that simplifies Firefox customization by automating the application of userChrome CSS tweaks, hardening configurations, and browser scripts. It lets users select desired customizations through an interactive interface and generates a new Firefox profile, or migrate settings from an existing profile while preserving history, bookmarks, and extensions. The tool operates from a config.json file for programmatic use, eliminating manual file copying and repository cloning typically required for Firefox configuration.

written from the facts on this page · September 2026

From the sources

A comprehensive firefox profile, themes, userCSS and userChrome builder - Explosion-Scratch/firebuilder

In the maker’s words, at launch

Hi HN! I've been working lately on unifying firefox configuration. Many people work on creating custom `userChrome.css` files and modules, browser user scripts, etc, but it's hard to actually use these a lot of the time. It usually involves cloning a repo, finding a folder and lots of copy paste. My tool…

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