If you have U Block original installed already then it is still working but for anybody like me who has never had it install, here are the directions for installing it on a chromebook since the changes that were made to the chromebook OS. For me using AdBlock Plus and disabling _ only in Broadhost works for me but UBlock is still usable or atleast partially usable on a chromebook if you sign into GitHub and download and install from there. Here are the instructions which might be useful for you in the future if UBlock quits working, though these instructions don't state which command-line flags to use.

How to enable uBlock Origin in Chrome (after Google's block ...Yes, you can use uBlock Origin on Chromebooks, but it's complicated due to Google's shift to Manifest V3, which broke standard uBlock Origin; however, workarounds exist (like installing directly from GitHub or using command-line flags in newer Chrome versions) to get the full version working, or you can use the lighter uBlock Origin Lite from the Chrome Store for a simpler experience, with Firefox being the easiest alternative for native support.
Why It's Complicated (The Manifest V3 Shift)
Google's Chrome browser is phasing out Manifest V2 (MV2), which uBlock Origin (uBO) relies on, forcing changes that block traditional ad blockers.
Recent Chrome updates (like version 142+) removed the easy workarounds, making it harder to keep the full uBO running.