Mozilla will shut down Pocket’s services on July 8, 2025. At that time users will no longer be able to access the Pocket website, apps and API. You can export your saved items and API data until October 8, 2025 before they are permanently removed. For more information, see this article.

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

userChrome.css syntax/reference

  • 2 replies
  • 3 have this problem
  • 581 views
  • Last reply by XorUnison

I have a surprisingly simple question that seems to be ridiculously hard to answer on my own.

Where can I get a full syntax/reference for the userChrome.css? I've spent now like a day of searching and all places talking about userChrome.css never mention a source for the object names

In other words where can I look up things such as ".tabbrowser-tab[pinned="true"]" myself, without having to ask every single time I want to make adjustments?

I have a surprisingly simple question that seems to be ridiculously hard to answer on my own. Where can I get a full syntax/reference for the userChrome.css? I've spent now like a day of searching and all places talking about userChrome.css never mention a source for the object names In other words where can I look up things such as ".tabbrowser-tab[pinned="true"]" myself, without having to ask every single time I want to make adjustments?

Chosen solution

You can use the browser toolbox to find the selectors yourself; this article has directions on how to use it.

There's also a really helpful website created by another member of this forum that has lots of resources for this: https://www.userchrome.org/ .

Read this answer in context 👍 3

All Replies (2)

Chosen Solution

You can use the browser toolbox to find the selectors yourself; this article has directions on how to use it.

There's also a really helpful website created by another member of this forum that has lots of resources for this: https://www.userchrome.org/ .

user1929 said

There's also a really helpful website created by another member of this forum that has lots of resources for this: https://www.userchrome.org/ .

I had already seen this website, but it wasn't sufficient.

user1929 said

You can use the browser toolbox to find the selectors yourself; this article has directions on how to use it.

Ah, this is it. I was wondering if there was an equivalent for the webdesign tools but I wasn't able to find it. This solution is 100%. Thanks a ton.