Can I use a regular E26 LED bulb as a replacement for a refrigerator light bulb?

In theory, any LED bulb should work. There are bulbs designed specifically for refrigerator/freezer use like this one. The bulb you listed is a 60-watt equivalent, which might actually be too bright - due to glare you really don't want your refrigerator to have too much light as it can actually make it harder to see things, as counter-intuitive as that may seem. The bulb I linked to mentions vibration resistance, among other things. In theory, "appliance bulbs" in general should be a bit more "heavy duty" than regular bulbs.

LED in refrigerator is ok but freezer may be too cold for an led. My refrigerator door switch has been replaced twice in about 3 years. The bulbs were 2 -60 watt bulbs . I opened the old door switch and found the contacts severely burnt causing the bulbs to be intermittent. I went for 2- 60 watt equivalent led bulbs (6.5 watt each Total 13 watts ) vs 120 watts for 2 -60 watt incandescent bulbs. The switch should last the life of the refrigerator. Make sure to get DAYLIGHT bulbs (5000K) to bring out the true colors and brightness in the refrigerator.