Please follow these 3 steps to complete the installation
Click the downloaded file at the bottom left corner of your browser screen.
Click "Yes" on the dialog box to approve the start of your installation.
Click "Install" in the installer window to begin installation.
Click "Save file" when prompted.
Double-click the installer in the list of downloaded files. If the list is not open, press Ctrl+J to show it.
Click "Install" in the installer window to begin installation.
Click "Run" when prompted at the bottom of the browser screen.
Click "Yes" on the dialog box to approve the start of your installation.
Click "Install" in the installer window to begin installation.