I’m trying to see what a certain webpage would look like if I replaced a certain image with another. Rather than upload the image, edit the site, etc, each time I tweak it, I’d like to know if there’s a way to change the image in the page to my local version while viewing the remote page.
I use Firebug for debugging web development usually, but I’m open to any other tool that might do this.
(It is absolutely impossible to search for this and find anything but questions about dynamic image swapping on a deployed website, so sorry if this is a duplicate.)
Added: I just tried substituting a file:/// URI pointing to the image (copied and pasted from the address bar after manually opening the image), and alas, it did not work — the image fails to change.
It seems to only work with the http[s] protocols (likely for security reasons). You can store your images on service like Dropbox, share the image or folder, then use the public URLs.
Really, you can use any web accessible images, so a local server would work too.