I started thinking about possible solutions and realized that the Zamzar video conversion plugin for Firefox was just the remedy.
After installing the plugin, conversion from video to mp3 is pretty simple:
1. Load the video you want to make into an mp3 in Firefox.
2. Click the "Convert with Zamzar" button that has been newly installed into your bookmarks toolbar.
3. You will be redirected to Zamzar's site where:
- Step 1 has already been completed for you.
- For step two, "Choose the format to convert to," select "mp3" from the drop down menu.
- Enter your email address into Step 3
- Click convert for Step 4 and you're done! Zamzar will convert the desired file for you and email it to the address you specified in step 3.