Since Dropbox can be used from anywhere, I find it convenient to download and save many files there. I find it especially useful to download files while I am browsing. For example, to save images or podcast MP3 files. The Download to Dropbox extension for Chrome makes this process convenient.
After installation, go to its Options. In the Dropbox Account tab, you need to authenticate this extension with your Dropbox account to give it permissions to write files into your Dropbox. After this, you can right-click on any content on a webpage and choose Upload to Dropbox. The file will be added to the directory
Apps/Downloads from Chrome in your Dropbox.
Tried with: Download to Dropbox 0.1.9, Chrome 35.0.1916.153 and Ubuntu 14.04