ublock.orgは安全ですか？

Not the real uBlock, the real one is Ublock Origin, mot just simply Ublock, the real one is also made by Raymond Hill, not ublock.org. If you do download the extension, you will be infected by malware and adware, I would getting Adwcleaner, Emsisoft Emergency Kit and Hitmanpro, they will get rid of the infection, then go and disable chrome syncing, after that, uninstall chrome and install it via another browser.

"BEWARE! uBlock Origin is COMPLETELY UNRELATED to the web site ublock.org The donations sought by the individual behind ublock.org are not benefiting any of those who contributed most to create uBlock Origin (developers, translators, and all those who put efforts in opening detailed issues). For the differences in features between uBlock Origin and uBlock, you are more likely than anywhere else to find an unbiased explanation in this Wikipedia article." check: *****