in content/zotero/xpcom/attachments.js:
   - removed all modifications to the code in this branch and returned it to the original state. Specifically: removed a function to attach 'http://' to URLs that start with 'www'; removed all user prompts regarding unrecognized urls

in content/zotero/zoteroPane.js:
   - translplanted the user prompts originally written in the attachments.js script to recapitulate the functionality.