The first beta after the full hard refactoring.
Keypoints:
Firefox
The most important changes in this beta take place in Firefox version. First of all, FF have finally released the WebExtensions technology which allowed us to completely revamp the extension code. It now greatly resebmles the code for Chrome extension, which makes it much easier for further development among other advantages. A lot of other improvements have been done, too.
[Improved] FF extension migrated to WebExtensions #523
[Improved] "Require" calls were got rid of #367
[Improved] SDK is not being used anymore #151
[Improved] -moz-binding approach was got rid of #463
Refactoring
We had been waiting for this for a long time, it took a lot of time but now the code is much more simple and convenient to work with.
[Improved] Global variables were got rid of #451
[Improved] Tabs API #374
Build process
The builds themselves are now available directly on GitHub, all the updates will be stored here. The build names are now more clear and understandable.
[Changed] The build process for v2.6 #600
[Changed] The build process was changed so that all Adguard's code is encapsulated into a reusable API #454
All issues fixed in this build:
Common
[Added] $empty modifier #280
[Added] Adguard French filter #612
[Changed] '2016' to '2017' #519
[Changed] filterlists.com were added to possible filters sources #544
[Changed] Filtering log performance #403
[Fixed] Rule constructor can't create a rule with [onclick] attribute which contains a big script #469
[Fixed] Rule constructor works incorrectly with TD tag #483
[Fixed] Regular expressions with $ aren't processed properly #517
[Fixed] Error while parsing rules with $replace modifier #559
[Fixed] Error while parsing wide filtering rules #556
[Fixed] Basic URL rule, which contains domain name, blocks WS #528
[Fixed] Blocked blob: URLs #525
[Fixed] Errors while parsing CSS rules #617
[Fixed] Sustainability to the LastPass vulnerability #625
[Fixed] Huge user filter slows down the 'options' page loading #641
[Fixed] Browsing security doesn't work #580
[Fixed] Error parsing pseudo class #576
[Improved] WebRTC circumvention #588
[Improved] Separate loading of the cosmetic filters and JS filters #512
Firefox - other
[Fixed] Integration mode #607
[Fixed] Possible error with generichide implementation #574
Chromium
[Fixed] chrome.webRequest.onBeforeRequest now intercepts WebSocket #572
Edge
[Fixed] Edge Storage size limit issue #566
[Fixed] Russian localization #538
[Fixed] Error on start/adding/removing filter subscription #627
[Fixed] Browsing security - "Proceed anyway" issue #628
[Improved] CSP fix is now applied for newer Edge versions (Insider Preview) #602
Safari
[Fixed] $websocket modifier works incorrectly in Safari #597
[Fixed] Possible websockets blocking issue #586
[Fixed] $elemhide exceptions also affect basic rules #642
[Fixed] User filter rules are being imported from .txt together with comments #584
[Fixed] Browsing security error #583
How to install Beta version
Chromium
Firefox (version 51 or newer)
Safari
Important note: beta version of Adguard extension is updated from our server. In Safari 9+ such updates cannot be applied automatically, you should check "Safari" -> "Extensions" from time to time.