Jon, I installed PH 3.0b3 without issue. AFAIK, it run as before.
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One of the issues I hope to avoid is running in 32 bit mode, though that is, for now, of lesser importance as I only have 2 GB RAM.

AdBlocker/GlimmerBlocker: What I like:
• I’ll always be able to upgrade Safari without breaking GlimmerBlocker.
• GlimmerBlocker doesn't hack Safari
• It is very stable.
But, it does not stop pop-unders, and I really hate those critters.

SafariAdBlocker: What I like:
• Built for 10.5+ and is 64 bit
• The developer seems very responsive to user issues & suggestions.

But what, pray tell, are the “subscriptions” that seems so gawd awful important? And, what is a Glim?


Harv
27" i7 iMac (10.13.6), iPhone Xs Max (12.1)

Those who can make you believe absurdities can make you commit atrocities. ~Voltaire