Mozilla Firefox will not install Adobe Reader from web sites until you add them to the Allowed List. Please follow the steps below.
1. Look for a yellow bar at the top
Step1
Click on the "Edit Options…" button in the bar to continue with download
2. Add the web site to the sites which are allowed to install add-ons
Step2
Click on the "Allow" button to add the site to the list of allowed sites
Click on the "Close" button to continue with download
3. Refresh the thank you page
Step3
Click on the refresh button on your browser.
4. A Firefox security dialog box will appear, prompting you to install the add on
Step4
Click on the "Install Now" button to continue with download.
5.An add on dialog box will appear
Step5
Click on the dialog close button.
Что это значит, объясните как для чайника
>>> Установка Adobe flash player в мозилу.