Using filter lists + hosts and other firewall stuff but this issue should be repeatable for anyone - none of that stuff seems to cause this issue. Nothing particularly out of the ordinary though, and it's repeatable on other machines outside of this environment.
Nope, I'm pretty sure it's just those idiots at Gelbooru spending all their time and money blocking ad blockers again instead of using that money to run the site, so they can then complain about how they have no money again.
Logger output
+2
##ins.adsbytrafficjunky
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##center > center > .hidden-xs
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##body img:style(filter:none !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##:xpath(//*[contains(text(),"disable")])
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##.navbar.navbar-default:style(float: left; width: 50% !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##.navbar.navbar-default .navbar-header button.navbar-toggle:style(float:left !important; margin-left: 10px !important; margin-right: 0px !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##.navbar-header .navbar-brand:style(font-size: 12px !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##.navbar#submenu:style(float: right !important; width: 50% !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##.contain-push div[style^="max-width: 728px"][style*="overflow"]
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##.contain-push center div[style]:not(#paginator)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##.contain-push > .hidden-xs
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##.contain-push .hidden-xs[style*="max-width: 728px"]
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
##.alert-warning:has(a[href*="javascript"])
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
###navbar2:style(float: right !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
###navbar2 ul li a:style(font-weight: normal !important; padding-left: 4px !important; padding-right: 4px !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
###navbar2 ul li a b:style(font-weight: normal !important; padding-left: 0px !important; padding-right: 0px !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
###navbar2 .navbar-nav:style(direction:rtl !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
###navbar ul.nav li:has(a[href*="moneygrubbingwhore.com"])
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+2
###navbar ul li a:style(font-weight: normal !important; padding-left: 4px !important; padding-right: 4px !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
gelbooru.com
1
image
https://gelbooru.com/favicon.png
+1
noopframe
<<
gelbooru.com
frame
https://static-42andpark-com.s3.amazonaws.com/html/danaton3.html
+1
||amazonaws.com^$important,domain=gelbooru.com
--
gelbooru.com
3
frame
https://static-42andpark-com.s3.amazonaws.com/html/danaton3.html
+1
gelbooru.com
3
script
https://www.gstatic.com/recaptcha/releases/66WEle60vY1w2WveBS-1ZMFs/recaptcha__en.js
+1
||gelbooru.com^$csp=script-src 'self' * 'unsafe-inline' *.gstatic.com *.google.com *.googleapis.com *.bootstrapcdn.com
--
gelbooru.com
1
inline-script
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
||trafficjunky.net^$important,domain=gelbooru.com
--
gelbooru.com
3
script
https://media.trafficjunky.net/delivery/js/ads.js
+1
||gelbooru.com^$important,generichide
--
gelbooru.com
1
generichide
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
gelbooru.com
3
script
https://www.google.com/recaptcha/api.js
+1
gelbooru.com
1
css
https://gelbooru.com//bootstrap.css
+1
gelbooru.com
1
css
https://gelbooru.com/css/jquery-ui.icon-font.min.css
+1
gelbooru.com
1
css
https://gelbooru.com/css/jquery-ui.css
+1
gelbooru.com
1
css
https://gelbooru.com/responsive.css?62
+1
##+js(set-constant, adtoniq, noopFunc)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(set-constant, ExoDetector, noopFunc)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(set-constant, adtoniq, noopfunc)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(set-constant, ExoDetector, noopfunc)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, window.dataLayer, gtag)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, serve, script_url)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, domain_base, exosrv.com)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, cookieName, gelcomPoop)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, adtoniq)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, ImplicityBreakingSite)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, AddZone, idzone)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-on-property-write, adsbyjuicy)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-on-property-write, GoogleAnalyticsObject)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-on-property-read, adtoniq)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(popads-dummy)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, ExoDetector)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(acis, BPJS)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
||gelbooru.com^$csp=script-src 'self' * 'unsafe-inline' *.gstatic.com *.google.com *.googleapis.com *.bootstrapcdn.com
--
gelbooru.com
1
csp
https://gelbooru.com/index.php?page=post&s=list&tags=all
+0
gelbooru.com
1
doc
https://gelbooru.com/index.php?page=post&s=list&tags=all
+0
https://gelbooru.com/index.php?page=post&s=list&tags=all
Logger output
+291
static-42andpark-com.s3.amazonaws.com
3,3
script
https://www.google-analytics.com/analytics.js
+291
static-42andpark-com.s3.amazonaws.com
3,3
script
https://www.googletagservices.com/tag/js/gpt.js
+291
static-42andpark-com.s3.amazonaws.com
3,3
script
https://securepubads.g.doubleclick.net/gpt/pubads_impl_121.js
+291
gelbooru.com
3
frame
https://static-42andpark-com.s3.amazonaws.com/html/danaton3.html
+291
gelbooru.com
3
script
https://www.gstatic.com/recaptcha/releases/66WEle60vY1w2WveBS-1ZMFs/recaptcha__en.js
+291
gelbooru.com
3
script
https://media.trafficjunky.net/delivery/js/ads.js
+291
gelbooru.com
1
css
https://gelbooru.com//bootstrap.css
+291
gelbooru.com
1
css
https://gelbooru.com/css/jquery-ui.icon-font.min.css
+291
gelbooru.com
1
css
https://gelbooru.com/css/jquery-ui.css
+291
gelbooru.com
1
css
https://gelbooru.com/responsive.css?62
+290
whitelisted
++
gelbooru.com
1
doc
https://gelbooru.com/index.php?page=post&s=list&tags=all
+290
https://gelbooru.com/index.php?page=post&s=list&tags=all
+277
static-42andpark-com.s3.amazonaws.com
3,3
script
https://www.google-analytics.com/analytics.js
+277
static-42andpark-com.s3.amazonaws.com
3,3
script
https://www.googletagservices.com/tag/js/gpt.js
+277
static-42andpark-com.s3.amazonaws.com
3,3
script
https://securepubads.g.doubleclick.net/gpt/pubads_impl_121.js
+277
gelbooru.com
3
frame
https://static-42andpark-com.s3.amazonaws.com/html/danaton3.html
+277
gelbooru.com
3
script
https://www.gstatic.com/recaptcha/releases/66WEle60vY1w2WveBS-1ZMFs/recaptcha__en.js
+277
gelbooru.com
3
script
https://media.trafficjunky.net/delivery/js/ads.js
+277
gelbooru.com
1
script
https://gelbooru.com//script/tryt.js?8
+277
gelbooru.com
1
script
https://gelbooru.com//autoDebug.js
+277
gelbooru.com
1
script
https://gelbooru.com//script/license.30.js
+277
gelbooru.com
1
script
https://gelbooru.com//script/bpjs.js
+277
gelbooru.com
1
css
https://gelbooru.com//bootstrap.css
+277
gelbooru.com
1
css
https://gelbooru.com/css/jquery-ui.icon-font.min.css
+277
gelbooru.com
1
css
https://gelbooru.com/css/jquery-ui.css
+277
gelbooru.com
1
css
https://gelbooru.com/responsive.css?62
+275
whitelisted
++
gelbooru.com
1
doc
https://gelbooru.com/index.php?page=post&s=list&tags=all
+275
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##ins.adsbytrafficjunky
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##center > center > .hidden-xs
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##body img:style(filter:none !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##:xpath(//*[contains(text(),"disable")])
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##.navbar.navbar-default:style(float: left; width: 50% !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##.navbar.navbar-default .navbar-header button.navbar-toggle:style(float:left !important; margin-left: 10px !important; margin-right: 0px !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##.navbar-header .navbar-brand:style(font-size: 12px !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##.navbar#submenu:style(float: right !important; width: 50% !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##.contain-push div[style^="max-width: 728px"][style*="overflow"]
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##.contain-push center div[style]:not(#paginator)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##.contain-push > .hidden-xs
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##.contain-push .hidden-xs[style*="max-width: 728px"]
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
##.alert-warning:has(a[href*="javascript"])
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
###navbar2:style(float: right !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
###navbar2 ul li a:style(font-weight: normal !important; padding-left: 4px !important; padding-right: 4px !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
###navbar2 ul li a b:style(font-weight: normal !important; padding-left: 0px !important; padding-right: 0px !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
###navbar2 .navbar-nav:style(direction:rtl !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
###navbar ul.nav li:has(a[href*="moneygrubbingwhore.com"])
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+22
###navbar ul li a:style(font-weight: normal !important; padding-left: 4px !important; padding-right: 4px !important)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+3
||gelbooru.com^$csp=script-src 'self' * 'unsafe-inline' *.gstatic.com *.google.com *.googleapis.com *.bootstrapcdn.com
--
gelbooru.com
1
inline-script
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
gelbooru.com
1
font
https://gelbooru.com/css/font/jquery-ui.woff2?juif-bac778
+1
noopframe
<<
gelbooru.com
frame
https://static-42andpark-com.s3.amazonaws.com/html/danaton3.html
+1
||amazonaws.com^$important,domain=gelbooru.com
--
gelbooru.com
3
frame
https://static-42andpark-com.s3.amazonaws.com/html/danaton3.html
+1
@@/script/lazyload.js?$script,domain=gelbooru.com
++
gelbooru.com
1
script
https://gelbooru.com//script/lazyload.js?1
+1
@@/script/application.js?$script,domain=gelbooru.com
++
gelbooru.com
1
script
https://gelbooru.com//script/application.js?58
+1
gelbooru.com
3
script
https://www.gstatic.com/recaptcha/releases/66WEle60vY1w2WveBS-1ZMFs/recaptcha__en.js
+1
gelbooru.com
3
script
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js
+1
@@/script/miscjs.js|$script,domain=gelbooru.com
++
gelbooru.com
1
script
https://gelbooru.com//script/miscJs.js
+1
@@/script/jquery*$script,domain=gelbooru.com
++
gelbooru.com
1
script
https://gelbooru.com//script/jqueryCaret.js
+1
||trafficjunky.net^$important,domain=gelbooru.com
--
gelbooru.com
3
script
https://media.trafficjunky.net/delivery/js/ads.js
+1
@@/script/jquery*$script,domain=gelbooru.com
++
gelbooru.com
1
script
https://gelbooru.com//script/jquery.cookie.js
+1
||gelbooru.com//script/tryt.js$important
--
gelbooru.com
1
script
https://gelbooru.com//script/tryt.js?8
+1
||gelbooru.com^$script
--
gelbooru.com
1
script
https://gelbooru.com//autoDebug.js
+1
gelbooru.com
3
script
https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js
+1
||gelbooru.com//script/license.$important
--
gelbooru.com
1
script
https://gelbooru.com//script/license.30.js
+1
||gelbooru.com//script/bpjs.js$important
--
gelbooru.com
1
script
https://gelbooru.com//script/bpjs.js
+1
gelbooru.com
3
script
https://www.google.com/recaptcha/api.js
+1
gelbooru.com
1
css
https://gelbooru.com//bootstrap.css
+1
gelbooru.com
1
css
https://gelbooru.com/css/jquery-ui.icon-font.min.css
+1
||gelbooru.com^$important,generichide
--
gelbooru.com
1
generichide
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
gelbooru.com
1
css
https://gelbooru.com/css/jquery-ui.css
+1
gelbooru.com
1
css
https://gelbooru.com/responsive.css?62
+1
##+js(set-constant, adtoniq, noopFunc)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(set-constant, ExoDetector, noopFunc)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(set-constant, adtoniq, noopfunc)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(set-constant, ExoDetector, noopfunc)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, window.dataLayer, gtag)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, serve, script_url)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, domain_base, exosrv.com)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, cookieName, gelcomPoop)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, adtoniq)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, ImplicityBreakingSite)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, AddZone, idzone)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-on-property-write, adsbyjuicy)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-on-property-write, GoogleAnalyticsObject)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-on-property-read, adtoniq)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(popads-dummy)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(abort-current-inline-script, ExoDetector)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
##+js(acis, BPJS)
gelbooru.com
dom
https://gelbooru.com/index.php?page=post&s=list&tags=all
+1
||gelbooru.com^$csp=script-src 'self' * 'unsafe-inline' *.gstatic.com *.google.com *.googleapis.com *.bootstrapcdn.com
--
gelbooru.com
1
csp
https://gelbooru.com/index.php?page=post&s=list&tags=all
+0
gelbooru.com
1
doc
https://gelbooru.com/index.php?page=post&s=list&tags=all
+0
https://gelbooru.com/index.php?page=post&s=list&tags=all
(Just so you're aware, I removed the parts of the logs with the thumbnails (they were all "allowed" though) - didn't want to unnecessarily cause any trouble because of content that might get Github's knickers in a twist).
I've spent a brief amount of time trying to figure out the issue myself but it's frankly not really my wheelhouse (and as you can see by the timestamps, I really do need to get to bed).