Happy to help! To be more specific, I recommend using sandboxie-plus in portable mode, and librewolf portable as the browser (fork of firefox that includes ublock).
Librewolf comes with an auto-updater exe which I would just rename. You can manually update it by grabbing the latest installer exe, extracting, and manually copying the librewolf folder across.
Sandboxie has a few things to configure but are mostly self-explanatory. Looking at breakout apps and file/folder permissions will be useful if you want to still be able to save to the local harddrive outside the sandbox.
Librewolf comes with an auto-updater exe which I would just rename. You can manually update it by grabbing the latest installer exe, extracting, and manually copying the librewolf folder across.
Sandboxie has a few things to configure but are mostly self-explanatory. Looking at breakout apps and file/folder permissions will be useful if you want to still be able to save to the local harddrive outside the sandbox.