Well, I am making the assumption you are using Windows due to the backslashes. For a full path URL, FireFox needs something like "file://F\:webpage\logo2.jpg" - but don't use that, it may be specifically incorrect and you'd have to change it anyway when you upload to a server.
If this page is in the "webpage" directory, link to your images and other links relative to this page - like
Another example, let's say you organize this so you have
With images being a folder/directory.
When you upload to a server, I'd replace it with this:
Because being on a web server, this always means to start at the domain root, which allows you to create directory structures without having to use relative "toothpick syntax." Note that
offline this will not work because your computer is not a web server. You'd need to remove the first slash viewing locally, replace it when deployed to the server.
Note also the forward slashes now; browsers will resolve them locally just fine, but it's that "where do we start?" at the beginning of the src/href that is causing the local problems.
I would follow both of the above concepts in your links, too: