Assuming you are using some type of list view for AddonBrowser and its ID is 50, the following works:
Code:
<onclick>ActivateWindow(AddonBrowser,addons://)</onclick>
<onclick>SetFocus(50,3)</onclick>
<onclick>Select</onclick>
You need to specify the "addons://" part of ActivateWindow to ensure you are at the base level of AddonBrowser, so you can't use ActivateWindowAndFocus and instead have to use SetFocus. I'm not sure if it will work for a panel view, but I think you can have multiple viewtypes as long as the SetFocus ID matches the first one (i.e. the first <view> ID is 50).
Main problem is that after you install from zip you are in AddonBrowser rather than where you were originally, though you could maybe solve this with an additional onclick that sets a window property with the return location and using an <onunload> in FileBrowser.xml to check if the property is set and then do an ActivateWindow with the property and clear it.