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Pale Moon is an open-source web browser forked off Firefox/Mozilla code, now fully independent.
SpecsUpdate
Pros
Pro Independent from Google and Mozilla
Pale Moon is an independent fork of an older version of Firefox. Therefore, it is independent from Mozilla and are not affected by their terrible decisions such as removing XUL, adding telemetry, pocket, etc.
Pro Has its own add-on ecosystem, built on time-tested technologies such as XUL (plus JS and CSS) and XPCOM
"Classic" Firefox add-ons can work, but they are not supported and should be updated or forked to become a Pale Moon add-on.
Pro Respects your privacy
Contains no spyware. Chrome and Firefox have an immense amount of spyware.
Pro Supports complete themes
Pale Moon supports complete themes, something which Firefox used to have before version 57.
Cons
Con Lacks some HTML 5 Features
As of Pale Moon 29.3.0, it is scored 431 in html5test.com. Goanna is a fork of Gecko, but its developer did not add more features to it.
Con Pale Moon is based on very outdated Firefox code
Although it is based on old Firefox code, it is still useful, just without Web RTC.
Con Unsecure
Pale Moon lacks the sandboxing and other privacy protecting features included in latest Firefox releases.
Con Lead developer loves Cloudflare and hates Tor
Website is cloudflared and he thinks most sites should be hostile towards tor.
Con Does Not support Web RTC
Moonchild Productions declared on their forum that they are not wanting to add Web RTC in Pale Moon, at least for now. Web RTC is essential for Video Calls, Online Photo/Video Capture, and all webcam-based websites.
Con Outdated rendering engine
It is an really old fork of Gecko that misses many of the newer web features.
Con Modern extensions library
Could use more active extension development and backports of modern extensions.
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