Most of the website I read regularly with voice-over have become practically unusable now, due to voice-over not interacting well with advertisements and having trouble loading the pages.
In some cases, voice-over completely shuts down and even using the reader mode is no guarantee of readability.
Now I can understand criticism for my view, after all websites do need advertisements in order to make money, however I would counter that for a completely blind user like myself the adverts are hardly going to persuade me to buy anything since I can't see what's been advertised and although sighted people might find adverts annoying, they can avoid them and still use the website as normal however voice-over completely crashes making those sites unusable for me and I would imagine, other visually impaired people.
That's why I imagine it to be a voice-over only gesture, so only those with a visual impairment would be able to use it.
Or perhaps someone could create a shortcut which would give the same effect.