Try switching to a different theme.

Does it still happen in Troubleshoot Mode?

If you are using CSS code in userChrome.css then this code might be broken.

More info about userChrome.css/userContent.css in case you are not familiar:

• https://www.userchrome.org/what-is-userchrome-css.html

Try switching to a different theme. Does it still happen in Troubleshoot Mode?

Changing themes doesn't help, but it does not happen in Troubleshoot Mode, just have to find the problem. Thanks for the help and God bless.

If you are using CSS code in userChrome.css then this code might be broken. More info about userChrome.css/userContent.css in case you are not familiar:

• https://www.userchrome.org/what-is-userchrome-css.html

I am using userChrome.css and will do some research.

This in fact is the problem:

.toolbarbutton-icon {
   fill: white !important;
   background: transparent !important;

}

What I need is how to change the background color of the "Find Bar", adding it here only changes the background of the icons (up/down arrows and toolbar icons) and I need for the toolbar icons to be white.

.toolbarbutton-icon {

   fill: white !important;
   background: transparent !important;

}

This is the problem, I need to change the background color of "Find Bar" because I need the toolbar icons to be white.

Rules for the Find bar should be placed in the findbar container

findbar {
background: rgb(xx,xx,xx) !important;
}

• https://searchfox.org/mozilla-release/source/toolkit/themes/shared/findbar.css

Rules for the Find bar should be placed in the findbar container

findbar {
background: rgb(xx,xx,xx) !important;
}

---

• https://searchfox.org/mozilla-release/source/toolkit/themes/shared/findbar.css

That works, God bless and have a great day.