For years, Facebook maintained compatibility with older hardware to ensure global connectivity. However, official support for the main Facebook app on Gingerbread ended several years ago.
breaks down the pros and cons of the light versus standard app. Android Evolution facebook android 2.3
For Facebook, buy a cheap, modern Android Go device (around $50) or use a desktop computer. buy a cheap
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If you are determined to use an app interface on a Gingerbread device, is your best option. is your best option.