This works just fine on non-mobile devices. I have not tested it on mobile yet, but my review is based on my desktop/laptop experience. I have seen questions like "Why does this add-on need the user's username and password?" when pointing to the permissions requested, that ask for all browser and input data. The way this add-on works is it creates a brand new request on your behalf using the data you input, as well as the data on the website. Don't be alarmed about it, it is not storing your data. Some people who write reviews don't know how things work, don't know why certain permissions are requested, and make bad assumptions. Enjoy the app on, at least, non-mobile platforms! :)