Help to edit a chrome extension (HTML & Java only)

As the topic said, i want to edit a chrome extension named "Bitcoin sneak peek" (just ~13KB) which is built by java. Actually this extension is to view the balance of any bitcoin address on the same page without migrating to any other blockchain services.

Whenever i click that icon behind the bitcoin address, it'll shows the balance of that address like this:

So, what i want to edit here is I don't want to click that icon to show the balance of any bitcoin address instead the balance of bitcoin address in any page should be also load along with the page. Here's the GitHub - steven2358/BitcoinSneakPeek: Chrome extension to instantly see the balance of any Bitcoin address. of Bitcoin sneak peek or install the extension directly from chrome store.
Or if need the code directly here it is:
Help will be appreciated.
Thanks!

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