A custom UI mod for Vivaldi Browser, based on Opera GX

• V1.4 - The last update of the decade
  • Redesign of the sidebar. Now, it is scrollable
  • Redesign of tabs
  • Re-enabled extra tansitions by default
  • Dropped a few settings
    The following things were removed.
    • $disableFixedSidebar
    • $operaFloatingPanel
    • $operaFloatingPanelDownMargin
    • $statusbarOnRightCorner
  • Hibernated tabs have "zZz" over their icon
  • Pop-up windows have "Vivaldi" suffix in their title
  • Many other minor UI improvements
  • Added Santa Claus as menu icon
• V1.3 - Minor improvements
  • Changed a few more icons
  • Fixed a bug with a small 1px line in the left side of Sidebar
  • Reverted floating side panels. Now it comes disabled by default, but can enable it again.
  • Settings stylezation was improved
  • Improved the stylezation on browser's side panels
  • Various pop-up dialogs got stylezed
  • Browser pages now have a colored icon - Thanks Tam
  • Reverted the transitions added. Can be re-enabled in the code
• V1.2 - Alot of improvements were made in this release
  • Color accent from websites change the colors of the UI icons
  • Floating side panels floats over the main bar
  • Line on the top has a little fade out
  • A lot of improvements in the address field were made
  • Incognito has it own main bar color
  • And maybe there's more, I don't remember what 1.1 had
• V1.1 - A few bug fixes, and the menu button is now connected with the sidebar
• V1.0 - Original release

1. Follow the steps here.
2. Next, here in this page, open Mod folder, then open the folder corresponding with you Vivaldi version.
3. You'll get some variations of the mod, open one of them, copy everything and paste inside a notepad app, then, save it as style.css