Work around for MacOS (High Sierra, probably it will work on newer os as well)
I downloaded the file AppleScript Toolbox.osax from here: https://astoolbox.wordpress.com/
Put the file in the folder: /Users/me/Library/ScriptingAdditions
Run Automator and start a new Service:


Paste this script
activate application "Firefox" -- or "Safari" or "Chrome", etc
set mousePointLocation1 to {1700, 250} -- coordinates depend on your screen size
AST click at mousePointLocation1 number of clicks 1
And save:

Go to Preferences > Keyboard > Services and add shortcut for this service

After that you will see the new shortcut here:

In Google Spreadsheet I press F5, to show the panel and then I press ^F5 and cursor jump on this panel and does click.
I'm a noob in macOS I'm sure it can be done better. It's just how I managed to do it right now.
Another modification of the script could be more convenient:
activate application "Firefox"
tell application "System Events"
key code 96 -- this is F5 key
end tell
delay .5
AST click at {1700, 250} number of clicks 2 -- or 3 maybe
This way you don't need to press F5. Just press ^F5 and go ahead.
It works

Just in case. If you know Python. I've managed to press F5 move and click mouse with Python module pynput:
from pynput import mouse, keyboard
k = keyboard.Controller()
k.press(keyboard.Key.f5)
k.release(keyboard.Key.f5)
m = mouse.Controller()
m.position = (1700, 240)
m.press(mouse.Button.left)
m.release(mouse.Button.left)
m.click(mouse.Button.left, 2)
https://pynput.readthedocs.io/en/latest/
It can be converted into macOS Service this way:

And then you can run this Service the same way via Keyboard > Services > Add Shortcut