Really dumb aside that shouldn't have made it past the editor (not least of all because of the insane rendering of "GoLang").
> Mozilla also backs the development of the leading cross-platform messaging client, Thunderbird.
This overstates Mozilla's involvement in Thunderbird. The relationship is basically ceremonial at this point.
> in 1998, owner AOL promised to open source it[...]. Four years later, the open source version shipped.
The way this is written makes it sound like there was a delay to fulfill the promise. In reality, it only took 2 months for Netscape to publish source code. It took another four years for them to decide to scrap the old code and undertake a rewrite that culminated in the release a 1.0 of a different product line which the author refers to here.