How to install downloaded extensions on google chrome when get a damage

If you try to add extension of google chrome, however it experiences a failure, You need to install it manually

Instruction

1. On google chrome, you need to open the tab extensions with URL chrome://extensions or Menu > Settings > Extensions. look at the picture below

2. Click this link chrome-extension-downloader, and then copy paste of extension url that you have got it in coloum of the extension, and also click button of download extension, look at the picture below

3. Drag-and-drop the extension that have been downloaded into Chrome, and after that click to add extension or the installation starts

4. Finish