I would like to request a built-in advanced custom content filtering system for Vivaldi on both Android and iOS, similar to the capabilities offered by uBlock Origin and Brave.

The system should allow users to add their own filtering rules in two ways:

  1. Direct Rule Editor

Provide a built-in text box where users can write or paste their own filtering rules using uBlock Origin-compatible syntax.

  1. URL-based Filter Import

Allow users to add external filter lists by simply pasting their URLs, such as GitHub Raw URLs or links from other sources. The browser should automatically fetch and update these filter lists.

The main goal is to give users control over exactly which parts and resources of a website are allowed to load and which are blocked. For example, users should be able to allow or block specific images, scripts, iframes and other website elements.

Both uBlock Origin and Brave already offer similar custom filtering and filter list management capabilities. I've attached screenshots showing these features in Brave for Android as a reference.

I believe this would be an especially valuable addition for iOS users, who would greatly benefit from having this level of built-in content control without needing to install additional third-party extensions. I hope Vivaldi will consider bringing these capabilities to both Android and iOS.

I've attached screenshots of Brave for Android as a reference. You can view them here: [Screenshot Link https://postimg.cc/gallery/xMbgVZy]