Photon Colors Theme Tweaks

userChrome.css

/* Photon Colors Theme Tweaks */
/* https://addons.mozilla.org/en-US/firefox/addon/photon-colors/ */
/* Fixes up problems that a theme cannot alter. */

/* Fixes the highlight on the new tab button. */
#tabs-newtab-button {
    --toolbarbutton-hover-background: color-mix(in srgb, currentColor 22%, transparent);
}

/* Turns menus back into light themed menus. */
/* These values are taken directly from global.css:257 for Windows 10. */
menupopup {
    --menuitem-hover-background-color: #e0e0e6 !important;
    --menu-background-color: #f9f9fb !important;
    --menu-color: #15141a !important;
    --menuitem-disabled-hover-background-color: rgba(224, 224, 230, 0.4) !important;
    --menu-disabled-color: rgba(21, 20, 26, 0.4) !important;
    --menu-border-color: #cfcfd8 !important;
    --menu-icon-opacity: 0.7 !important;
}