Translate Youtube captions and look up words easily! This add-on adds a button on Youtube screen so you can translate captions/subtitles with 1 click. You can also look up words used in captions from add-on menu. Choose translate service from Google or DeepL, or customize as you like. Online dictionary setting is also customizable. You can select captions/subtitles text if you turn off "Look up words"option. Copy and paste freely! [NOTE: You can also install as Chrome Extension] *Please use it at your own risk. 1. Open Chrome browser. 2. Download Firefox add-on file from HERE. 3. Rename file extension from "xpi" to "zip", then unzip it. 4. Open Chrome MENU > MORE TOOLS > EXTENSIONS 5. Turn on DEVELOPER MODE. 6. Select LOAD UNPACKED. 7. Select the unzipped folder above. 8. Click EXTENSIONS icon on Chrome toolbar. 9. Pin "Quick translate for Youtube captions".