Open Chrome and make sure you're logged in to your Google account. Then, point Chrome to gemini.google.com/extensions. On this page, you'll find five boxes, one for each feature. 

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You can toggle the enable/disable switch for each. I've enabled everything apart from the Google Workspace feature (because I don't want Gemini accessing my documents stored in Google Drive).

After enabling these features, go to gemini.google.com and click the + sign in the left sidebar to start a new chat, powered by the extensions you've enabled. 

What you did earlier was enable extensions within the Gemini service. This time around, we'll add an extension to Chrome that opens Gemini as a sidebar. This isn't the official Google Gemini Extension because, quite honestly, that one is pretty worthless.

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You can install the Gemini Side Panel extension from the Chrome Web Store by clicking Install and then, when prompted, clicking Add Extension. 

Once installed, click the extension icon to open the Gemini sidebar and start using the service. Trust me when I tell you this is the way to go, as the official Chrome extension only seems to do what Google Search is already doing (displaying Gemini results alongside standard search results). 

You can also enable experimental AI features in Chrome. The operative word isexperimental. Some features may not work as expected and some may never get added to the service. To access the AI settings page, type chrome://settings/ai in the Chrome search bar and hit Enter.

Click the On/Off slider for "Try out experimental AI features."

When I enabled experimental features, only one appeared: the Tab organizer. After I enabled the feature, a new entry appeared in the tab right-click menu, labeled Organize Similar Tabs. As expected, this feature was pretty buggy and I couldn't get it to work. 

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Given this feature is listed as experimental, that's to be expected. Again, your mileage may vary with this feature, but it's nice to see what Google has in the pipeline.