how to bget rid of all the unwanted suggestions, themes, add-ons that came with the update

Do you have any specific area or functionality in mind?

(There are no themes or add–ons coming with 155.0.1 update bundled, or offered.)

Hello,

To remove extensions, do this : Go to menu (3 horizontal lines, select extensions and themes, click extensions, and remove unwanted ones.

To remove extension suggestions, do this : Go to menu >settings>tabs and browsing. Scroll to the bottom and uncheck the things under the heading "Recommendations".

To turn off address bar extensions : Go to menu> settings, then select search, then scroll down to the address Bar and uncheck the boxes for website suggestions, sponsored suggestions, and shortcuts.