Besides standard tabs like 'About', 'Events' or 'Photos', you can add custom tabs to your Facebook Page. These custom Page tabs load content from your Qualifio campaigns. Yet Page tabs will only be displayed in the web UI. Mobile custom tabs are not supported by Facebook at this time.
Since Facebook’s Apps and mobile site do not display any custom tabs, we provide a unique 'smart' URL for each of your campaigns that is both desktop- and mobile-friendly! It detects the type of device the user is on and displays a version that the user can see. You may have read about it already. The workaround is that mobile users are directed to an ‘external link’ that opens in the Facebook browser.
When you use Facebook sharing or Facebook login options, dialogue windows should open. Unfortunately, since 2016, Facebook no longer allows the opening of dialogue windows from the Facebook in-app browser.
For instance, when clicking on the 'Share on my wall' button in this campaign:
Normally, this 'Share on my wall' button should open a dialogue window such as this one:
However, since dialogue windows are blocked on the Facebook in-app browser, nothing happens when one clicks on 'Share on my wall'.
Get the Facebook dialogue to work by checking the dedicated option.
Go to your campaign's 'Settings' step and click the 'Enable Facebook in-app browser compatibility' setting. This will resolve the issue by adding an overlay with a 'Participate' button:
This button will then open your campaign out of the iframe ('_top' target) so that participants can use Facebook sharing and login buttons: