Bugzilla powered MozillaThe organization behind Firefox — advocates open web standards and internet privacy., Apache, and thousands of open-source projects before JiraAtlassian's issue tracker — workflows, boards, and JQL queries for software team project management. dominated enterprises. Its severity levels, dependency graphs, and email notifications defined how developers filed and triaged bugs online — the ancestor of every modern issue tracker UIUser interface — the parts of software people see and interact with..

Bugzilla was the open-source bug tracker every OSS project used before GitHubA platform for Git hosting, pull requests, and CI — the center of open-source collaboration. Issues.

It established web-based bug workflows that JiraAtlassian's issue tracker — workflows, boards, and JQL queries for software team project management. and others later commercialized.