As has been posted absorption fridge technology has been around over a century, It is used in commercial installations, has been used in homes and RV's. I will admit there is always a danger of bad things happening with ANY technology, many go on and on about the danger of fridge fires, this danger can be limited or practically eliminated by adding the proper safety devices.
Absorption Cooling is not as efficient as compressor type Fridges, so it uses more energy but.. For an RVer who boondocks, the fridge burns very little electricity when it is running on propane (Some older units might well not burn any but I'm not that old rv wise) it's just that it burns about 3-4 times the electricity a residential fridge would burn when running on electric.
When my Absorption unit fails I may go to a high-effiency all-electric (Burns less than half what a residential would burn) or I may just repalce the cooling unit.