"Matching the US tariffs dollar for dollar" is such a stupid policy.
A better policy would be stopping flows of Canadian dollars to the US. Declare that US patents are no longer valid in Canada. Pass a law requiring that Apple and Google allow competing app stores on their phones with no strings attached. Remove any penalty from jailbreaking phones and allow anybody who wants to sell jailbreaking kits. Declare a universal right to repair in Canada, so that Canadian farmers don't have to pay John Deere if they want to repair their tractors. Say that all copyrights belonging to the Hollywood copyright cartel are no longer recognized, and let people trade their music, tv and movies freely.
Nobody's going to be brave enough to do that. But, really, the US declaring a 25% across-the-board tariff on Canada is basically an economic nuke. Don't respond with a measured and exactly equal economic war response. Canada can't win by fighting by those rules.
Edit: Better yet, because it's more likely to be possible, just decriminalize it. Don't change the laws. Just make it clear to police and prosecutors that someone who infringes on American IP should be treated like someone smoking pot in public in 2015. Imagine someone setting up a little kiosk in the Eaton Centre selling the latest movies and software for pennies while the cops just ignored them. If John Deere tries to get someone charged for selling "fix your tractor" software bundles that bypass the access controls on tractors, the police should just laugh at them. Picture a kiosk that roots your phone and lets you install a Canadian app store where the vendor's cut is only 5% not 30%, and all the profits stay in Canada. A thriving business could be set up where you bring in your HP printer, and walk out with a device that can use any ink at all. Canada could even host How-Tos and tools for the rest of the world on how to take control over your electronics. Can you imagine how quickly Tim Apple would book a flight to Mar A Lago to beg with Trump to back down?
I think this is much more likely in Mexico though. The respect for US intellectual property is already pretty low there to begin with. But, formally, the government still officially respects US IP. What if they let off the brakes entirely and just let the "invisible hand of the market" work without the handcuffs of IP law?