I've run across a second SnapBack extension (in post #11 here) which "(It) adds a pair of entries to the context menu - one for setting the snapback page and another for reloading that page."

Paired with the previously linked extension it actually surpasses Apple's original SnapBack functionality, but, without the key combos, only cumbersomely well.

(Can key combos can be implemented in an extension?)

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire