Pending any announcement in France tomorrow it's worth noting that restrictions in Paris are very light compared to Ireland but if you're travelling please remember:
A surgical facemask must be worn at all times in the stadium and all open spaces in Paris (cloth masks are not acceptable in France); upload the French covid app and have your Covid vaccination cert on the phone (you won't be allowed enter the stadium without it), all bars and restaurants will demand it and there are random police checks; there are plans to change the rules governing the vaccine pass from 15 Jan but these have been held up in Parliament.
Make sure your paperwork is complete before you reach the passport check in Paris, they will put you on the next plane if it's not in order (visit
https://mobile.interieur.gouv.fr/Actualites/L-actu-du-Ministere/Certificate-of-international-travelhttps://mobile.interieur.gouv.fr/Actualites/L-actu-du-Ministere/Certificate-of-international-travel
).
As Ireland is on the green list today, a negative test is not required to enter France (unfortunately, the French police often confuse Ireland with the UK and demand a negative PCR test but it's not necessary, at least at the moment).
For the return to Ireland, you need a negative antigen or PCR test result. Testing facilities are on almost every street in Paris so it's not a problem, simply join the queue and let them know you need it for travel, expect to pay around EUR 20 and receive the necessary documentation on your app in return. It's an efficent process and a great opportunity to practice your leaving cert French!