Customizer icon

Customizer

by Robustus · Functionality & UI
FeaturedManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Add custom CSS to one or many sites

Users
204
+19 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
1
0 in 30 days
Store rank
#63K
#53K among extensions
Version
4.1
updated 8 Jul 2026

Users

monthly, 3 years
1117233Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 204 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
001Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 1 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Customizer

Sometimes websites don't look the way you want them to. Simplify or change them with Cascading Style Sheets. CSS can be applied to many pages with the * wildcard. It is applied before the HTML loads. The CSS is edited in a popup window or the big options page, not in a sidebar of the page; you are not hindered by the page. Features: • Edit CSS: View & edit styling for one page or many • Storage Sync: Options saved for use on any computer Instructions: Configure Keyboard Shortcut: 1. Click the icon for this extension 2. Click "Keyboard shortcuts" 3. Make a keyboard shortcut for "Big options page: edit site" 4. In the future, use this shortcut so you can use "Inspect Element" Instructions: Add Site: 1. Open the popup or big options page 2. Go to the field "Add site" 3. Type in a URL like the following • Normal: en.wikipedia.org • Wildcard: *.wikipedia.org or * 4. Hit enter or click the plus button Instructions: Edit CSS 1. Open the popup or big options page 2. Add rules and change properties 3. Refresh the site

Growth

WindowUsersChangeRatingsRating
7 days+1+0.5%00.00
30 days+19+10.3%00.00
6 months+23+12.7%00.00
1 year+11+5.7%00.00

Version history

8 versions recorded
4.18 Jul 2026
4.021 May 2026
3.522 Nov 2025
3.413 Mar 2025
3.38 Nov 2024
3.26 Aug 2024
3.110 Jun 2024
3.020 Dec 2022

Details

Category
Functionality & UI
First seen
13 Mar 2025
Size
166 KB
Languages
en-US
Pricing
Free
Privacy policy
gitlab.com
Extension ID
nkhdafpofippbfhihgnpbnmmgcflegdf

Permissions and risk

Moderate riskimpact 3, likelihood 1
Permissions
tabsstorage

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