Or perhaps my ISP's range of dynamic IPs improved its reputation recently?
I think this is likely the reason. maybe someone abused your ip or ip range in the past that caused it and that abuse fell off whatever range they use for deciding it. I've never gotten a captcha on google search when I've used it unless I had a VPN up.
LibreWolf
Welcome to the official community for LibreWolf.
LibreWolf is designed to increase protection against tracking and fingerprinting techniques, while also including a few security improvements. LibreWolf also aims to remove all the telemetry, data collection and annoyances, as well as disabling anti-freedom features like DRM. If you have any question please visit our FAQ first: https://librewolf.net/docs/faq/
To learn more or to download the browser visit the website: https://librewolf.net/
If you want to contribute head over to our Codeberg: https://codeberg.org/librewolf