After a recent Firefox update, I can't seem to copy text from a certain area of an in-house website. Unfortunately, since it's an in-house website, I can't give a way to replicate the issue. The issue persists for my coworkers. It works in Chrome. I've tried Ctrl+C and right clicking, and it does not work. I have reinstalled and used private mode and does not work. I have also tried changing dom.webcomponents.enabled and dom.webcomponents.shadowdom.enabled to true. The text is surrounded by a <slot> tag. If I remove the tag, copying works. I don't think specifically the <slot> tag is the problem, but the problem should be whatever is being associated with the <slot> in the website. I guess I could change the website to remove the <slot> tags. Everything was fine before the update, which is why I am asking if maybe there's a bug or something overlooked in the update. EDIT: After further testing, if I left click and select the exact text, I am able to copy. Whereas, if I triple click to get all of the text, it does not work.