FF 131 started to support text fragments URLs (as an experimental feature it seems), what would be great for user awareness and usage is to be able to create link from the selected content (after a right click, or other interaction in mobile apps).
Multiple text fragments are supported in the URL, but a user generally selects only one portion of text so I would only support one text fragment at first. And maybe later think about supporting multiple text fragments but I believe that could be the work of an extension to support multiple text fragments.