To remove the extractor you must first remove the rear slide cover. Be very careful or the extractor rod and spring will be launched into oblivion never to be found again. Or worse yet, you’ll poke your eye out. After the cover is off remove the rod and spring assembly. The extractor may fall out. If not remove it. Once the extractor is out the safety/striker block plunger should be removed. It will have a tiny spring accompanying it.
Here’s video. Last part is slide disassembly.