e/OS/ is often behind on Android monthly security patches by a month or more. Insecure and not very deblobbed of proprietary blobs, especially when compared to GrapheneOS.
DuckDuckGo Browser is a webview browser which has weaker tab isolation and uses the system's default webview implementation, most often chrome webview.
Canvas blocker is redundant with Librewolf's protections (privacy.resistFingerprinting), same with JS blocker redundant with uBlock Origin. You make yourself more fingerprintable. It is better that you first understand what protections you have and why before adding new addons that increase attack surface. The features you are looking for are included already.
Storms