Created Firefox addon to look up Cangjie for Chinese text

Cangjie is an input method for typing Chinese based on how the character is written rather than how it is pronounced. It comes in handy when studying Chinese and encountering a new word that you can’t pronounce, since if you can guess how to decompose the character into the Cangjie components, you can type it and therefore look it up. Sometimes, it’s hard to guess how to decompose the character, so I made a Firefox addon to be able to right-click and look up the character’s Cangjie code. The addon grabs the selected text and looks up the code from a lookup table, then it displays the code in a popup on the page next to the cursor.