First, did you know that Mozilla Firefox have services to send and to do other commands? If you visit on Mozilla Services Activation website you can install share services, including Facebook, Twitter, Tumblr, Google+ and Gmail. Yahoo Mail and Outlook.com have not created the services plugins, but if you want to send to email, you can do it using ‘Email Link’ function in Firefox. I Google Chrome, there is no official feature from Google to share to multiple accounts instead of install Chrome extensions from its web store.
Edit March 22, 2017: The select and copy problem mentioned earlier has being improved recently.
Google Chrome’s pdfium on https://code.google.com/p/pdfium/ is a HTML5 eReader that has simple user interface and can read and copy .pdf document. The disadvantage here is that to install you need to use git to install.