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Toggle suspend:

f1::suspend

Close the script:

f2::exitapp

Reload the script:

f3::reload

Edit the script:

f4::edit

I find that including this speeds up editing / testing:

browser_back::edit        ;edit in code editor

browser_forward::         ;save and exit editor
send ^{s}
send !{f4}
return

browser_refresh::reload   ;refresh

You could add reload at the bottom of the browser_forward hotkey, but I prefer having it separate.