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"multiple selection of tabs in the Chrome" is a very poor workaround for the lack of multiple selection in Tab Outliner:

1. When navigating from inside Chrome, if the page titles are too long to properly id (usually the case esp. when the tabs are shrunk due to many tabs open which would usually be the case for users of Tab Outliner), you have to first single-select the page to confirm whether you want to multi-select it.

2. When navigating from inside Tab Outliner, if the page isn't already open, you have to first double-click it in Tab Outliner to open it and suffer the opening time, bandwidth and memory usage.