Which browsers does Stylebot support and is it free?

Stylebot runs on Chrome, Firefox, and Edge on desktop, and the site describes it as free and open source. The page lists no paid tiers, subscription plans, or pricing details, so there is no evidence of a paid version. It is a browser extension that lets you point at an element on a page, change its appearance, and have Stylebot write and reapply the CSS each time you return.

Supported browsers and platform

The install path is the same in each browser: add the extension, then open the editor with the toolbar icon or the Alt+Shift+M shortcut.

What "free and open source" means here

The site's own description calls Stylebot "free and open source for Chrome, Firefox and Edge." That covers two separate claims:

• Free: no price, plan, or payment step appears anywhere on the page.
• Open source: the source code is publicly available, which is what the label normally implies.

Because the page contains no pricing signals at all, treat "free" as the current stated status rather than a guarantee about future versions. If cost matters for a team rollout, confirm on the project's repository before standardizing on it.

What you get without paying

The free extension includes the full editing workflow described on the page:

1. Open the editor — click the icon or press Alt+Shift+M.
2. Pick an element — click to select it; the fields show its current styles.
3. Style it — use the Basic controls (text, font, size, color, alignment, background, box, effects) or write CSS directly.
4. Save profiles — keep different looks for the same site and switch between them in a click.

There is also a CLI for coding agents:

npm install -g @stylebot/cli
stylebot open harbourpost.example
stylebot outline 54432929
stylebot css set harbourpost.example < night.css
stylebot screenshot 54432929 -o check.png

This lets an agent that can run commands open a page, inspect its elements, apply a stylesheet, and capture a screenshot to check the result.

Choosing whether it fits

• Pick Stylebot if you want per-site visual tweaks that persist across visits, work in Chrome, Firefox, or Edge, and cost nothing to try.
• Look elsewhere if you need mobile browser support or a formally priced, supported enterprise product — neither is described on the page.

A practical first test: install it in your main browser, restyle one site you visit daily, close the tab, and reopen it. If the style reloads automatically, the core promise holds for your setup.