However, it's still possible to install Pulltube's Chrome extension.
It takes just a couple extra steps:— download extension package here:
Pulltube Chrome Extension— unzip it and put the extracted folder somewhere safe, maybe Documents folder. It needs to stay there for Chrome to use a source, when using the extension.
— launch Chrome and go to Settings > Extensions or click this
chrome://extensions URL or copy paste it to the address bar.
— turn on
Developer mode then click
Load unpacked.— navigate to that location, where you saved extension folder, select it.