You might get better answers in the houseplant forum. This forum's members are primarily concerned with edible figs AKA Ficus Carica. They are not grown as houseplants. Good luck getting answers. Sorry I can't help you.

Was it in full direct sun in its former life or in the shade? Light coming through glass is filtered even if the glass is clear, so if got significant outdoor sunlight befdore you got it, overwatering seems more likely than sunburn. So, how do you water? Does the pot have a drain hole? The brown patches look just like the photos in the other FLF threads on the first page of this forum (and dozens more on the pages after that), almost every one of which is due do overwatering, so don't feel like you're the first person to have the issue. I almost feel like starting a thread aimed at new FLF owners! Anyhow, the goal is to control soil moisture so the roots don't die from drought or suffocate from lack of oxygen in saturated soils. I'll bet the soil in that pot is very fine, peaty, water retentive potting soil that stays saturated in the bottom half of the pot long after the top inch or two is bone dry. The good news is that there's an easy, quick and reliable way to check soil moisture and prevent any more drowned roots. Here's a thread about caring for sick plants that will explain what's going on, and here's an excerpt from a post by tapla (Al) specifically about when and how to water. Try his method and your plant will love it. And don't hesitate to ask more questions! "You can tell you've watered too much (or too little - the response is the same - a drought response) when leaves start to turn yellow or you begin to see nutritional deficiencies created by poor root metabolism (usually N and Ca are first evident). You can prevent overwatering by A) testing the soil deep in the container with a wood dowel ... wet & cool - do not water, dry - water. B) feeling the wick & only watering when it's dry C) feel the soil at the drain hole & only water when it feels dry there. Soils feel dry to our touch when they still have 40-45% moisture content. Plants, however, can still extract water from soils until they dry down to about 25-30%, so there is still around a 15% cush in that plants can still absorb considerable moisture after soils first feel dry to us. Water slowly until the soil is saturated but no water (or very little water) has exited the pot drain. Wait 10-15 minutes and water again so at least 15-20% of the volume of water used ion both applications flushes out the accumulating salts. After the pot stops draining, you can return it to its normal spot and arrangmt. Wait until time to water again & repeat the routine."

Roots were kept moist throughout. Cleared off every bit of soil we could and untangled roots, then removed lower portion. I did recognize that it was more like regular soil and have been letting it dry fully (2.5 weeks before 2nd watering). I check by digging my finger in as low as I can. For the first year I was watering every 2-3 weeks. I would not be surprised to hear that I overpotted. The pot used to contain the plastic one that the tree came in for the first year, and I moved into the containing pot instead when repotting since the plastic one was a mess and cracking.

Ficus lyrata are notorious for being difficult plants for a beginner/black thumb, but I think plants are not difficult as long as you give them what they need. That being said they enjoy lots of light so I'm thinking your placement is good. Doesn't look unhealthy to me, but keep an eye out for unexpected leaf loss. I can't tell what those brown spots are though, could be nothing. They also do not like to move around too much...so wherever you decide let it settle. My experience with drainage is always holes. I pot the plant in the black plastic pots like the ones from the nursery and set it inside the nice pot. This provides good drainage and you can easily move or repot the plant while still using the pretty pot. If you want to leave it in your current set up just make sure you don't overwater. Disclaimer: I am not an expert, but figured I would share the little I do know.