I used to love liver and onions and would order it often at restaurants. I tried fixing it once and I did not do a good job of it.
Once I knew about it being the filter for toxins in the blood, I quit eating it. I have not had it in many years. Rest of my family never cared for it.
You might do a little reading on liver, it is a processing plant, not a storage tank. It does not hold toxins any better than the other meats we eat.
This article says liver (of reindeer) contain a bit more of some chemicals and less of others, but none to the levels that would be harmful. ( I guess reindeer because they knew what they ate and what was in what they ate.)
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3417694/
https://www.healthline.com/nutrition/why-liver-is-a-superfood#TOC_TITLE_HDR_5
"Another common concern about eating liver is that it contains toxins. However, the liver does not store toxins. Rather, its job is to process toxins and make them safe or turn them into something that can be safely removed from the body.
In conclusion, toxins in liver are not an issue, and it should certainly not be avoided for this reason."
https://www.marksdailyapple.com/does-the-liver-store-toxins/
"
To call the liver a simple filter is incorrect. If we want to maintain the metaphor, it’s more like a chemical processing plant. The liver receives shipments, determines what they contain, and reacts accordingly. It converts protein to glucose, converts glucose to glycogen, manufactures triglycerides, among many other tasks, but its best-known responsibility is to render toxins inert and shuttle them out to be expelled – usually in the urine via the kidney. It doesn’t just hang on to toxins, as if the liver is somehow separate from the body and immune to contamination."
https://riemerfamilyfarm.com/blog/beef-liver
Many people have concerns about liver acting as a storage for toxins in the body. The liver's job as a part of the body is to
process toxins and then continue them on through the body's elimination systems. The liver does not store toxins, but it does store many essential nutrients that are used to process the toxins. These nutrients include vitamins A, E, D, K, B12; folic acid, and minerals such as copper and iron. Of all the organ meats, liver is by far the most nutrient dense.