I dont think youll find anything fully browser based, youd need to run an emulator somewhere, there are good ones available for PC and Android, dont know about iOS.

If you have a Wii U I think it can be picked up there still. There would likely also be a legal distinction between ripping your own copy of the game and downloading someone else’s ripped copy of the game, which makes playing Breath of the Wild in this manner something of a legal risk. Looking to emulate it from my web browser safely. You could argue that purchasing a copy of the game for the Wii U allows you to legally play it via the emulator but, as we’ve discussed in the past, there are rarely cases where the argument for fair use is a slam dunk. There is a question about legality, however. There is also a thread in the CEMU subreddit dedicated to getting the best framerates possible in the emulated version of Breath of the Wild. 16GB of GSkill Ripjaws RAM overclocked to 2400 MHz.The creator of the video is running the game with the system below, and there are extensive notes on how to adjust the CEMU settings in the video description: Emulation isn't a dirty word, and one man thinks it can save gaming's history

How to emulate breath of the wild on pc