dark mode for browser

 chrome
Enter "chrome://flags" into Google Chrome's address bar and enable the "Auto Dark Mode for Web Contents" flag to force Google Chrome to display all websites in dark mode. You can also use a browser extension to force sites into dark mode.

 

To Enable Dark Mode for All Sites in Microsoft Edge

    Update Edge to the latest Canary build (see the version list below).
    Type the following in the address bar and hit the Enter key: edge//flags/#enable-force-dark.
    Select the option Enable from the drop-down list next to the 'Force Dark Mode for Web Contents' line.
    Restart the browser once prompted.


How to Turn on Dark Mode in Firefox

    Step 1: In Firefox, go to the top-right corner and open the menu by clicking the hamburger menu and then click on the “ Add-ons ” menu entry. You could also use the Ctrl+Shift+A keyboard shortcut. ...
    Step 2: Now, we need to switch to the themes page. You can do that by clicking “ Themes ” on the left side of the screen.