If you are looking for a Cantonese-English dictionary for GDF (as an alternative for this Cantonese-English Dictionary extension that relies on the now-retired Mouseover Dictionary Framework (MDF)), subscribe to the comments feed of this post. I'll keep you informed regarding any updates on this matter.
Update (2015/4/17): The GDF version of Cantonese-English Dictionary has just been released. Part of the dictionary data contained in the MDF version had to be omitted in this first release due to a license issue, but I'll try to solve this in the future. For more information, read the user guide.
Frequently Given Answers:
I am not the owner of the original Cantonese-English Dictionary extension. I just helped the owner modifying my Mandarin dictionary extension to support Yale/Jyutping romanization schemes.
There are some issues to deal with before porting it to the new framework.
You can still use the old version (at least for some time) although MDF was officially retired.
I'd be very thankful if you would help me resolving those issues and releasing an updated version by making a monthly donation via Patreon. Given the number of MDF users (although it doesn't reveal how many of them are active users), contributing $1 a month can make a difference.
Feel free to post your question/thoughts here.