After switching to Landscape mode, you should be able to Sign-in to your Facebook Account and enjoy the full functionality of Facebook, as available in the Desktop Version of Facebook.
Of course, you can do this with any other app, as well.
Open Facebook Desktop Version on iPhone Using Chrome Browser If you are using Google Chrome Browser on iPhone, you can access the Full Desktop Version of Facebook using Request Desktop option as available in Google Chrome browser.
Unfortunately, the results will only show a larger version of the Facebook mobile site so try using Firefox.
Changing your settings or hiding posts from your newsfeed can be nothing short of aggravating.
If you use a password manager of have a good memory, select an ultra secure unique password e.