1. Converted string-based processing into typed array-based processing of following things.
   • Element hiding specific filters
   • Blocking by domain name
   • Domains listed for $domain option in blocking rules
2. Special treatment for Element hiding specific filters
   • During retrieval of data, conversion of typed array to string for matching filters selectors takes a very small amount of time. This time is reduced for subsequent requests by adding "Least Recently Used" (LRU) cache.
3. Significantly reduced Javascript memory usage by storing filters in a more compact form.
4. Performance Improvements
5. Removed support for $rewrite option

• Fixed issue with enrolling users in Acceptable Ads.

• Fix $csp issue
• Fix memory leak issue
• Significantly reduced extension memory consumption
• Significantly reduced the memory footprint
• Performance Improvements
• Added queueing mechanism for Extended CSS Selectors
• Added Acceptable Ads filter list as default option for new users

Added support for following filter options

• $genericblock
• $document
• :-abp-properties()
• :-abp-has()
• :-abp-contains()

Added Adguard Base Filter, Spyware and Annoyance Lists

Changes

• Added support for $webrtc
• Added support for $rewrite
• Added support for $generichide

Changes

• Added support of $websocket filter option

Changes

• Removed Survey Page

Changes

• Added support for $csp filter option. The $csp filter option allows for the injection of additional Content Security Policies, which in turn allow for requests, frames, images, scripts and more to be blocked.
• Added the new ABP anti-circumvention filter list as default
• Added survey page

Firefox WebExtension

Moving further towards Firefox WebExtension, we are releasing pure Firefox WebExtension version which will support Firefox version 52 and onwards.

We will be soon releasing this version to AMO.

Firefox WebExtension

We are updating uBlock to support Firefox WebExtension API, as required by Firefox. The legacy version of Firefox is converted to the Embedded WebExtension which transfers the stored data of your legacy extension to a format that can be used by WebExtensions. To use this extension you will need to be on Firefox 52.0 to 56.*

Important: When you install uBlock/embed-webext for the first time, it will migrate all your user settings from legacy storage to WebExtension storage. During the first launch, You might experience some delay in readiness due to the migration process.

We will be soon releasing this version to AMO.