Question

chrome.windows.getCurrent only gets me the background.html itself. What I really want is the content window that the user is browsing.

Any tips for this, thanks!

Answer 1

The current window is the window that contains the code that is currently executing. It’s important to realize that this can be different from the topmost or focused window.
For example, say an extension creates a few tabs or windows from a single HTML file, and that the HTML file contains a call to chrome.tabs.getSelected. The current window is the window that contains the page that made the call, no matter what the topmost window is.

If you want to get content window what user is browsing you can use following code:

popup.js

chrome.windows.getAll({"populate":true},function (windows){
    for(i=0;i<windows.length ;i++){
        if(windows[i].focused){
            for(j=0;j<windows[i].tabs.length;j++){
                if(windows[i].tabs[j].selected && windows[i].tabs[j].active && windows[i].tabs[j].highlighted ){
                    console.log(JSON.stringify(windows[i].tabs[j]));
                }
            }
        }   
    }
});