firefox.exe
Summary
Mozilla Firefox web browser. Uses a multi-process architecture with separate content, GPU, and extension processes.
firefox.exe is the 170th most commonly executed Windows program in EchoTrail's dataset, observed 93,754 times across enterprise environments. It typically runs from C:\Program Files (x86)\Mozilla Firefox and it is most often launched by firefox.exe.
Behavior
Top Paths
- C:\Program Files (x86)\Mozilla Firefox58.47%
- C:\Program Files\Mozilla Firefox36.29%
- C:\Users\...5.16%
- C:\...0.08%
Top Hashes (SHA256)
- e1010feb5e9d4726c2a8bf092d3f00521cccb2ee7189273eeb8d297a469104b99.67%
- 4b69ae5b7d548efc56fdbe2e650ce2b519ae0c9c928640023077b956c51a71387.84%
- ca1908a1e033add60a2508676343fdc6d2968cfa7c2ad55075121e66ebf58d5a5.97%
- b545f86afd3d4fa8e8c1e1f86ce1b060accf79ad9b1be6ce3a51067da8561c864.69%
- 58e603d7d22e792719e2d3199f69414f4578836de4b5e7ba75d8e23fa209ff834.29%
- 11919097ac77d204232674e4ff4dfbc8875dab663e28ce4eeb2419cbc16dbb8d3.76%
- 6bcaa2b71971433cfeeea784a782c57e1a8afc209beec285dcb037b20c9c0f353.32%
- d25d8b21ad3b8123634d8968c8c19aa1f2c345442de561251ad13e2b53bd6b0a3.04%
- 321fc20533971feb7ee0b2c78ed1f69032ea41a7e2a44388648e2d3818f9c5b92.85%
- 0ab5c89a52a289c0e64a46847f12f478e9e4a68a6e98d737363f338f8dd724df2.52%
Process Ancestry
Top Grandparents
- explorer.exe70.86%
- userinit.exe8.78%
- updater.exe5.81%
- KeePass.exe4.64%
- OUTLOOK.EXE4.01%
- firefox.exe1.48%
- svchost.exe0.24%
- setup-stub.exe0.2%
- HelpPane.exe0.12%
- lync.exe0.11%
Top Parents
- firefox.exe75.48%
- explorer.exe9.75%
- OUTLOOK.EXE6.12%
- KeePass.exe2.65%
- svchost.exe2.2%
- updater.exe0.81%
- lync.exe0.29%
- RuntimeBroker.exe0.11%
- EXCEL.EXE0.1%
- IronKey.exe0.07%
Top Children
- firefox.exe80.52%
- pingsender.exe9.17%
- plugin-container.exe1.82%
- AcroRd32.exe1.63%
- updater.exe1.07%
- Zoom.exe0.79%
- EXCEL.EXE0.74%
- protocolhandler.exe0.73%
- WINWORD.EXE0.55%
- OUTLOOK.EXE0.39%
Rare or environment-specific process names are omitted from ancestry tables. Percentages are of all observed relationships.
Security Analysis
What does firefox.exe normally do?
Located in C:\Program Files\Mozilla Firefox or C:\Program Files (x86)\Mozilla Firefox. Multi-process — many instances normal.
When is firefox.exe suspicious?
Spawning shells (cmd.exe, powershell.exe). Running from unexpected paths. Scheduled tasks launching the browser. DLL sideloading.
How do attackers abuse firefox.exe?
Same as other browsers. DLL search order hijacking. Drive-by downloads. Firefox credential store can be targeted for credential theft (key4.db, logins.json).
Detection guidance
Monitor for shell spawning. Credential store file access by non-Firefox processes.
False positive notes
Multiple instances normal. Updates spawn temporary processes.
Related Processes
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Data from EchoTrail's dataset of ~346M Windows process executions. Last extracted 2026-08-04.