57 , named Firefox quantum ,
plugins also known as extensions or add-ons , created using the
have stopped working .
Firefox versions before
57 , had a lot of plugins , which are still useful today .
This tutorial , will show how to install a version of Firefox , with which , the old plugins still work ,
and it will detail , the most useful plugins .
way of installing a version of Firefox with which old plugins
work , is to download , and install , a version of Firefox prior to
Old versions of Firefox , can be gotten from this
It is not advisable to use an old version of Firefox , because of security issues .
An alternative way , which can be used along the newest version of Firefox ,
is to download , and install ,
Once a version of Firefox less than
57 , or a Firefox alternative , has been downloaded and installed , and to be
able to install classic extensions , the
extension Classic Add-ons Archive must be installed .
This extension can be downloaded from
Classic Add-ons Archive
to be successfully installed , unsigned extension installation must be allowed .
This can be done by visiting
about:config page in Firefox , or one of its
alternative , and
to false .
Also , the multi-process mode must be disabled .
This can be done by visiting the
page in Firefox , or one of its alternative ,
and setting any
to false .