I have noticed that my local SSPX chapel has installed a photo of "Pope" Francis (alongside Archbishop Léfebvre and Fr Pagliarini) at the entrance and was wondering is this a common occurence across other chapels?

Also, did the SSPX of former times ever place photos of prior Conciliar Popes in their chapels?

No these photos were definitely only installed very recently. I also heard that another SSPX church a few hours away has recently put up a photo of Francis as well so I think there is some coordinated effort ongoing.

I also remember a fiesty old woman taking down a Wojtyła photo and tossing it into a dust bin, frame and all, making sure the glass pane shattered on impact.

 I like her.

This practice has been going on for decades.  Nothing new.  Perhaps these chapels were behind the times or had a more conservative priest assigned who was later reassigned.

If I had to guess, one reason is probably to gain the confidence of Newchurchers who either decide to satisfy their curiosity and see what a TLM is like ("see, Madge, these people aren't so bad, they're in union with Pope Francis"), or who might stumble into an SSPX chapel not realizing it isn't a "regular" parish church.  The latter could happen especially in areas with many tourists, though when the Mass is, ahem, different from what they've ever experienced before, well, that could be received differently by different people.

I've stumbled upon "strange" churches when traveling myself.  I once went to Mass in Pittsburgh, to some ethnic parish I was passing on Ascension Thursday, and to this day, I have no earthly idea what language they were speaking.  I'm kind of guessing Hungarian.

True. Like others have said the picture of Bergoligo is not new. However, ever since COVID the SSPX has pamphlets or brochures all over their chapels to placate the Novus Ordo refugees who believe the SSPX is schismatic. It’s a marketing ploy to get more people in the chapel.

Full-colour, glossy brochures existed back in the 1980s for the SSPX US District. These were almost ubiquitous in the chapels. Then, they just sort of disappeared in the 1990s. I am not sure if the supply ran out and they were not reprinted, or if they were yanked by the US District for some reason or other.

Or to make sure they aren't mistaken for those evil sedes!

Yeah, that's a large part of it.  How ridiculously childish that all is.  SVism is a legitimate opinion, as +Lefebvre himself indicated, given that the various Doctors and theologians discussed just such a possibility.  While no one can force them to agree with the position, it's also very childish of them to attempt to demonize it and dogmatize their anti-sedevacantism.

I have noticed that my local SSPX chapel has installed a photo of "Pope" Francis (alongside Archbishop Léfebvre and Fr Pagliarini) at the entrance and was wondering is this a common occurence across other chapels?

Also, did the SSPX of former times ever place photos of prior Conciliar Popes in their chapels?

What's wrong with having a picture of Bergoglio in an SSPX chapel? They recognize him as their true and legitimate "pope", don't they?

Yeah, that's a large part of it.  How ridiculously childish that all is.  SVism is a legitimate opinion, as +Lefebvre himself indicated, given that the various Doctors and theologians discussed just such a possibility.  While no one can force them to agree with the position, it's also very childish of them to attempt to demonize it and dogmatize their anti-sedevacantism.

Yes, but at the end of day, the Mass at any TLM venue is either una cuм or it's not.

And unless someone is sitting on the front row and has very good hearing, it won't be obvious one way or the other.