An excellent and unique feature of Vivaldi browser that stands out and lacks other browsers is, Vivaldi adapts to the color of the page and automatically changes its UI accordingly. You can get this feature in Firefox by installing the VivaldiFox extension. Not all users are the same, different users have different perspectives, if you don’t like the tab coloring feature, you can easily disable it by visiting settings, see how it can be done.
READ: VivaldiFox add-on brings Vivaldi-style UI coloring and custom theme creation to Firefox
Vivaldi 1.4: Theme Scheduling Feature
Prevent or prevent the Vivaldi browser from changing the color of tabs
1. Open Vivaldi, click V menu> Tools > Definitions > themes
2. Maximize the settings window, click the button Pencil icon to edit the theme (default),
3. Uncheck Active page highlight color
4. Give the theme a name and save, you need to use it as the default theme from now on, so that Vivaldi doesn’t change the interface color of each tab/page.
READ: Vivaldi 1.3 Snapshot adds support for customizable UI themes