In Vivaldi, go to the Chrome Web Store.
Select and install an extension just like you would in Chrome.
In Vivaldi, go to vivaldi://extensions.
Click the check mark by the extension to enable it.
Unckeck the check mark to disable the extension.
In Vivaldi, go to the Chrome Web Store.
Select and install an extension just like you would in Chrome.
In Vivaldi, go to vivaldi://extensions.
Click the check mark by the extension to enable it.
Unckeck the check mark to disable the extension.