We have converted our Firefox builds into pure WebExtensions add-ons and fixed several bugs in this version. Details below,
[Changed] FF add-on has been converted into a pure WebExtension #819
Mozilla plans to release Firefox 57 as a browser supporting only WebExtensions add-ons. So any add-on that is not a WebExtension will stop working. Due to this, Firefox Nightly had already been marking our add-on as a legacy one. This change guarantees that AdGuard extension will remain supported by FF-based browsers.
Other
[Fixed] http://www.zdfans.com/ bug #818
[Fixed] A problem with ad blocking #786
[Fixed] 'Block ads on this website' button doesn't respond in legacy version #710
[Improved] Upgrade "ExtendedCss" module to v1.0.8: #771