For example I want to post
this image on the forum I can't. (the blob link is not working, yk open the link in a new tab thing)
It would be useful if I could do it.
I am pretty sure the blob link is just temporary data, it's basically generated internally by the browser. Blob urls are local, single instance in a browser for that session/same session.
This can explain why you cannot use it on a forum, you have to download it and upload it somewhere else and use the "insert image" thing to make it show of course.
You can read up on it more on
This which is more helpful than me explaining it.
Otherwise, it's pretty pointless just to waste more space for just one image and it's better for them to be blob URLs aka temp data.