CustomCSS Injector

Write any CSS rules for any websites
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Originally developed as an Add-On for FireFox, Custom CSS Injector lets you write any CSS rules and apply them to any website you like. Change colours, backgrounds, resize and hide obtrusive elements. Anything you can do within the power of CSS! Simply write the CSS you want to apply in the provided text field and click 'Save' (NO page refresh required!). Apply the CSS to the URL, Domain or Globally by using the radio buttons provided. There is also a whitelist/blacklist functionality to govern which websites you'd like to apply the CSS to. Enjoy syntax highlighting and line numbers for code readability (Thanks to PrismJS!)

Manifest V2
By:
Bryce
Users:
95
Rating:
2.50
(2)
Version:
1.0 Last updated: 2020-03-02
Creation date:
2020-03-02
Risk:
Moderate risk impact High risk likelihood
Permissions:
  • activeTab
  • storage
  • <all_urls>
  • contextMenus
  • notifications
Size:
38.87K
Email:
br*****@gmail.com
Full description:
See detailed description
Source:
Chrome Web Store
Updated:
2 years ago

User reviews

I've been using this extension for a while now, pretty much just on the domain level. It's been great other than a bug where you often times cannot see the CSS code without highlighting it. I often have to just copy and paste my code into the text box as a workaround. It would also be nice if you could export/import your code. I'd like to be able to share my CSS with other browsers and computers.
by Benjamin Moran, 2021-09-30
Globals don't seem to work. Any fix? thx!
by Johny Why, 2021-08-14
View all user reviews ›

Extension safety

Risk impact

CustomCSS Injector requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
  • Medium ******* ******* ************* ***** *** ** ******* *** **** ******* ****** ******** *******
Risk likelihood

CustomCSS Injector may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

Risk likelihood analysis details
  • Critical This extension is not longer available in the store
Upgrade to see full risk analysis details

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