Firefox Community Forum

1. navigator-toolbox>toolbar:not(#toolbar-menubar):not(#TabsToolbar):not(#nav-bar) {

   padding: 0px 4px 4px !important;
 }

  .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]){
   max-width: 300px !important;

}

1. tabbrowser-tabs {

 --tab-min-height: 36px !important;
 height: 36px !important;

}

#tabs-newtab-button {
   margin-left: 13px !important;
   margin-bottom: -1px !important;
 }
.tabbrowser-tab {
   margin: 0 -14px 0 -3px !important;
 }
 
 .tab-background{
   margin: 0 10px !important;
   background: #F0F2EA;
   background-clip: border-box;
   border: none !important; 
   -moz-transform: perspective(80px) rotateX(8deg) !important;
  -webkit-transform: perspective(80px) rotateX(8deg) !important;
   outline: none !important;
   border-top: 1px solid #7E7B7B !important;
   border-right: 1px solid #7E7B7B !important;
   border-left: 1px solid #7E7B7B !important;
   border-radius: 9px 9px 0 0 !important;
  margin-bottom:-1px !important;   

}

  .tabbrowser-tab:hover > .tab-stack > .tab-background:not([selected="true"]) {
   background-color: #D1D5C6 !important;
 }
 
 .tabbrowser-tab[selected="true"] .tab-background {
   background: #F0F2EA !important;
 }
 
 .tabbrowser-tab[selected="true"] .tab-text.tab-label {
   color: black !important;
 }
 
 .tab-line {
   display: none !important;
 }
 
 .tab-content {
   padding: 0 25px !important;
 }
 
  /* for backward compatibility */
 .tabs-newtab-button.toolbarbutton-1 {
   margin-left: -0px !important;
 }
 
 .titlebar-placeholder[type="pre-tabs"] {
   border-inline-end: initial !important;
 }
 
 #tabbrowser-tabs:not([movingtab])>.tabbrowser-tab[beforeselected-visible]::after,
 #tabbrowser-tabs[movingtab]>.tabbrowser-tab[visuallyselected]::before,
 .tabbrowser-tab[visuallyselected]::after {
   border-color: var(--tabs-border-color);
   margin-top: 0 !important;
   margin-bottom: 1px !important;
   opacity: 8 !important;
   border: none !important;
 }
 
 [tabsintitlebar]:root:not([extradragspace]) .tabbrowser-tab::after,
 .tabbrowser-tab:hover::after,
 #tabbrowser-tabs:not([movingtab])>.tabbrowser-tab[beforehovered]::after {
   border: none !important;
 }
 
 .tab-text.tab-label {
   text-shadow: initial !important;
   color: black !important;
   font-style: unset;
   text-decoration: none !important;
   -webkit-font-smoothing: antialiased !important;
   -moz-osx-font-smoothing: grayscale !important;
 }
 
 .tabbrowser-tab:hover .tab-text.tab-label {
   color: black !important;
   text-shadow: none !important;
   -moz-osx-font-smoothing: unset !important;
 }

Firefox 132.0.2 (64-bit)

In other browsers/programm work correctly https://docs.google.com/

From me topic: https://forums.getpaint.net/topic/130993-copy-paste-image/ Im copy image from paint.net to Google docs and image broke.

Image 1 Copy part/full image from Paint.net Ctrl+C https://i.imgur.com/bIQTdr0.png 2-3 Image after paste Ctrl+V in Google docs and this broke https://i.imgur.com/5J8lx7j.png https://i.imgur.com/HRqXvHT.png 4 Copy image from paint.net to Discord good work https://i.imgur.com/osHLsGa.png 5 Copy-paste from discord to Google docs also broke transparent. https://i.imgur.com/nSNdfk7.png

6 Im copy white square from Paint.net Ctrl+C https://i.imgur.com/BbCA2Tq.png 7 After paste Ctrl+V in Google doc, black line appeared. Broke image https://i.imgur.com/gR0sEzq.png

Not only me https://bugzilla.mozilla.org/show_bug.cgi?id=1866655 https://support.mozilla.org/en-US/questions/1436969 https://github.com/graphics32/graphics32/issues/257 https://community.atlassian.com/t5/Confluence-questions/Screenshots-are-corrupted-when-pasting-from-paint-net-into/qaq-p/2581186#M290501 https://forums.getpaint.net/topic/124628-1-px-line-on-top-of-every-image-pasted-into-firefox-from-paintnet/ - 2 page ideas how fix https://forums.getpaint.net/topic/124444-screenshots-are-corruptedshifted-when-pasting-from-paintnet-into-firefox

When you go to the YouTube community tab, click on a link like https://www.youtube.com/post/UgkxFmoD_WE2uSNmIHw1Njhj36JVQMnzrWzz this example I get a banner that this page slows down firefox and after a few minutes the tab crashes. I tried disabling extensions, but it didn't help me. I came across this on two different PCs on Windows.

ff 131.0 x64 win10 x64 1809