hello I would like to know if there is a camera plugin for flutter web in order to take a photo and store it in a temporary path to then upload it to firestorage
If I understood correctly and i hope you already tried these packages image_picker & image_picker_web
Check these resources, it seems pretty same to your scenario;
https://github.com/flutter/photobooth
https://medium.com/flutter/how-its-made-i-o-photo-booth-3b8355d35883
Reply back if this is helpful to sort out the problem or share with us how did you solved it.