Google offers a dizzying array of Gemini modes and options and an equally overwhelming series of AI subscription plans that control how much you can use those capabilities, but you don’t need to worry about any of that to create custom Chrome extensions. You might sometimes see better results if you switch your Gemini model to “Pro” or your Gemini thinking level to “Extended” — designations that even Gemini itself has trouble deciphering (believe me, I asked!) — but just using the default Gemini settings with a free Google account will generally work quite well.
Getting going with a custom Chrome extension is as simple as opening up a new Gemini chat and telling the system what you want it to cook up for you. The hardest part is deciding what you want and what’d be helpful for you — something we’ll explore more in a moment, via specific examples and suggestions. Once you’ve got that, you can just ask Gemini to create a Chrome extension that’ll accomplish what you’re envisioning, with as much specificity as possible about what it’ll do and how it’ll look.
Gemini will spit back a series of plain-text code chunks with instructions to copy each cluster and paste it into a new plain text file with a certain specific name — things like “manifest.json,” “content.js,” and “styles.css.” All you’ll do is use the on-screen button to copy each segment, then open up any simple text editor (like Windows Notepad, macOS TextEdit, or any number of simple online text editors) and paste the text in, then save it under the name Gemini gives you.
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