From the backend of your Joomla site ( administration ) select installers and then the type of extension ( component, mambot/plugin, module, site template and so on )
- First browse for the package file
- Click the install icon
- Follow instructions
- For large extension, you cannot use the automated installer. In such case
- Unzip all the files locally
- In the install directory transfer the files to a folder
- Then use installer to install the file
