Topic on Extension talk:JSBreadCrumbs

The available version for MW 1.35 via ExtensionDistributor [1] is 1.0.3 (at least this results from extension.jsonof JSBreadCrumbs-REL1_35-b4d0b95.tar.gz), but the latest version is 1.1.0.

[1] https://www.mediawiki.org/wiki/Special:ExtensionDistributor?extdistname=JSBreadCrumbs&extdistversion=REL1_35

Why isn't redirecting to it? Or is it wrong labeled?

JSBreadcrumbs uses the 'master' compatibility policy (see Compatibility#MediaWiki extensions). To get the most recent code, you need to select the master branch in Extension Distributor or use git to pull the tag you want.