It is reported that now when searching Avast or AVG on Mozilla Add-ons official website, will not return any results of situation occurs. Even the existence of these extensions, the current store does not return or SafePrice Avast Online Security or AVG Online Security or SafePrice.
Mozilla seems to have deleted the expansion of its store. When the user tries to open one store URL extension of Avast or AVG, "Oops! We can not find that page" error message appears.
However, Mozilla extensions will not blacklisted. Extension has been blacklisted will be put into block list in and therefore deleted from the user's browser.
And although Avast and AVG extensions have been removed, but it has not been blocked, which means that these extensions temporarily remain in the Firefox browser. Mozilla in December 2, 2019 will be dozens of Firefox extensions added to the blocked list, these extensions without disclosure or consent to collect user data, but Avast extensions are not in the list.
It is understood, AdBlock Plus creator Wladimir Palant on his personal Web site in late October 2018 released an analysis of Avast extension. He found that the expansion of Avast transfer data to Avast, thus providing browsing history information Avast. Data submitted by the extended beyond the data required in accordance with Palant run.
Wladimir Palant claims , Mozilla is currently negotiating with Avast. It may be that Mozilla will be extended to the list maintained by the stop it, or ask Avast make changes before extending recovery.
Reference News: https://www.ghacks.net/2019/12/03/mozilla-removes-all-avast-firefox-extensions/