how do i go back to previous version
Since coolpreviews isn't supported on new version, how do i restore previous version with the addons i was using?
Since coolpreviews isn't supported on new version, how do i restore previous version with the addons i was using?
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Coolpreviews discontinued support for their addon entirely, it is a dead add-on. https://www.coolpreviews.com/
This is frowned on for web security and other reasons.
Install an older version of Firefox {web link}
CoolPreviews was released under a proprietary license. If they open sourced the code, someone could (legally) update it.