How to Customize a Website With Amino's Live CSS Editor

Amino is a browser extension that lets you write CSS against any website and see the result immediately, with your changes persisting on later visits. Use it when you want to restyle a site you don't control — hiding clutter, resizing text, recoloring elements — and you're comfortable writing or pasting CSS selectors. It is not a visual drag-and-drop theme builder, and it can only change what CSS can reach in your own browser; it does not alter the site for anyone else.

What Amino Is and What It Changes

Amino describes itself as "a compact and powerful browser extension that allows you to customize any website with CSS that persists," with an editor for building "your own website themes and skins."

Two things follow from that description:

• Scope is per-browser. Your rules apply to your copy of the page. Other visitors, and the site's own servers, are unaffected.
• Persistence is the point. The value of Amino over a one-off DevTools edit is that the CSS you write is still there the next time you load the site.

The site's own page currently returns only a JavaScript-disabled notice ("this app doesn't work properly without JavaScript enabled"), so the specifics below cover the standard workflow for this class of extension. Treat exact button labels and menu names as things to confirm in your installed version rather than fixed facts.

Prerequisites

• A Chromium-based browser (Chrome, Edge, Brave) or Firefox, with the Amino extension installed from your browser's extension store.
• A target website you can load normally.
• Basic CSS knowledge: selectors, properties, and how specificity decides which rule wins. If you can write nav { display: none; } and understand why it might not take effect, you have enough.

Step-by-Step: From Install to Saved Style

1. Install the extension and open your target site

Install Amino, then navigate to the page you want to restyle. Load it fully before editing — if the site renders content after a delay, selectors for that content won't exist yet.

2. Open the editor

Activate Amino from the browser toolbar. The editor is where you type CSS. The expected result is a panel that stays open while the page remains visible behind it, so you can watch changes land.

3. Write a rule and watch it apply

Start with something unambiguous so you can confirm the loop works:

body {
  background: #111;
  color: #eee;
}

The expected result is an immediate repaint of the page. If nothing happens, the problem is almost always the selector, not the extension — see the troubleshooting section.

4. Narrow in with selectors

Once the loop is confirmed, target specific elements. Use your browser's built-in inspector (right-click → Inspect) to read the real class names and IDs on the page, then write rules against those:

/* Hide a sidebar */
aside.sidebar { display: none; }

/* Widen the main column to use the freed space */
main { max-width: 1100px; margin: 0 auto; }

The expected result is a layout change you can see without reloading.

5. Iterate against the live preview

This is where a live editor beats editing a local stylesheet: change a value, see the effect, change it again. Adjust one property at a time when you're unsure what's responsible for a visual result.

6. Save so the style persists

Save the ruleset for that site. The expected result is that closing the tab and reopening the site shows your styling already applied, without you re-entering anything. This saved state is what distinguishes Amino from a temporary DevTools tweak.

7. Verify persistence

Reload the page, then open a new tab to the same site. If the styling holds in both, the save worked. If it holds only until reload, the rules were applied but not stored.

Troubleshooting: Why a Rule Doesn't Take Effect

The last row is worth noting because Amino's own site depends on JavaScript to render — a reminder that on script-heavy sites, elements you want to target may not exist until the page settles.

When Amino Is the Right Tool — and When It Isn't

Choose Amino if you want repeatable, personal restyling of sites you visit often, you're comfortable writing CSS, and you want the changes to survive reloads without maintaining a userscript or a local stylesheet injector.

Look elsewhere if you need a no-code visual theme editor, you need changes to apply to other people or to the site itself, or you need to restyle a page whose content is rendered in a way CSS can't reach (for example, inside a canvas or a cross-origin iframe).

A practical example of a good fit: a documentation site whose sidebar and top banner you find distracting. Two rules — hide the banner, collapse the sidebar — turn it into a clean reading view, and those rules stay in place every time you return.

FAQ

Does Amino change the website for other people? No. It applies CSS in your browser only. The site's servers and other visitors are unaffected.

Do I need to know CSS? Yes, in practice. Amino is an editor for writing CSS, not a point-and-click theme designer.

Will my styles survive a site redesign? Only if your selectors still match. Rules tied to class names the site later renames will stop applying, and you'll need to update them.

Can I use it on any website? The extension is described as working on any website, but effectiveness depends on whether the elements you want to change are reachable by CSS in your browser.