9,868 companies in our data use Firefox, and 2,245 of them name it in job posts they wrote. From October 2025 to August 2026, 1,285 job posts named it. IT teams are its most common home.
Which companies name Firefox in the most job posts?
Amazon, ASPIRE DERMATOLOGY and CACI International Inc mention Firefox in the most job posts. Of the five companies in the table, Amazon has the most employees who list it on their profiles: 42.
CompanyPostsPeopleRecent job post
AmazonRetail Trade · first seen Sep 202271842
"Knowledge of Knowledge of Windows desktop environment and use of Word, Excel, IE, Firefox etc"Staff Pharmacist, Amazon Pharmacy, Oct 22, 2026
ASPIRE DERMATOLOGYHealth Care and Social Assistance · first seen Sep 20221470
"Must be able work with various computer programs effectively and efficiently, including but not limited to, Windows 10, Microsoft Office Excel, Word and Outlook, and Google Chrome/Firefox."Revenue Cycle Representative/Medical Receptionist, Oct 17, 2026
CACI International IncProfessional Services · first seen Aug 20221362
"…Office products, and various Internet browsers to include Internet Explorer and Mozilla Firefox"Senior End User Technician, Nov 1, 2026
AutoZoneRetail Trade · first seen Oct 20221320
"Skilled in using common internet browsers such as Internet Explorer, Firefox, Chrome, and Safari."Field Sales Representative, May 13, 2026
ALLDATAScientific and Technical Services · first seen Oct 20221091
"Skilled in using common internet browsers such as Internet Explorer, Firefox, Chrome, and Safari."Field Sales Representative, Nov 4, 2026
0.74 in every 10,000 job posts named Firefox from June to August 2026, against 0.54 from March to May. One company accounts for most of that change.
Show the data
Month
Job posts naming Firefox
All job posts
Per 10,000
Oct 2025
117
1,413,673
0.83
Nov 2025
154
1,822,119
0.85
Dec 2025
80
1,236,103
0.65
Jan 2026
117
1,828,002
0.64
Feb 2026
111
1,856,647
0.60
Mar 2026
95
1,850,711
0.51
Apr 2026
90
1,728,886
0.52
May 2026
107
1,821,509
0.59
Jun 2026
123
1,909,496
0.64
Jul 2026
128
1,815,180
0.71
Aug 2026
163
1,835,698
0.89
How many companies named Firefox in a job post for the first time in recent months?
In the three months to August 2026, 43 companies posted about Firefox for the first time. From March to May, 47 did. From October 2025 to August 2026, 187 companies named it in a job post for the first time.
March to May 202647
June to August 202643
October 2025 to August 2026187
Companies whose first job post naming it appeared in that period. Recruiters, staffing firms and job boards are left out.
How do we know which companies use Firefox?
7,623 of the 9,868 companies show up because employees list Firefox on their profiles; 2,245 name it in their own job posts. 311 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name Firefox
2,24523%
Employees' profiles list Firefox
7,62377%
9,868 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use Firefox?
By size, the biggest group of Firefox users is companies with 50 to 999 employees, at 42%. The second-largest group is companies with fewer than 50 employees, at 22%.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
22%22%
50 to 999
42%38%
1,000 to 5,000
19%17%
Over 5,000
17%23%
Where are Firefox companies based?
Firefox is concentrated in the United States, home to 51% of the companies that use it. Italy is second, at 6.2%.
ShareTypical
United States
51%43%
Italy
6.2%1.5%
United Kingdom
4.5%6.4%
Canada
4.2%3.6%
France
3.9%4.6%
Spain
3.9%1.8%
Companies in 115 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
4,776
51%
43%
Italy
580
6.2%
1.5%
United Kingdom
420
4.5%
6.4%
Canada
392
4.2%
3.6%
France
370
3.9%
4.6%
Spain
362
3.9%
1.8%
Which teams work with Firefox?
At 57 companies, the team named in Firefox job posts is IT, at least twice the next. QA teams are second, at 16 companies, and development teams third, at 10.
TeamCompanies
IT
57
QA
16
Development
10
FSS
9
Operations
9
Service desk
9
What else do Firefox companies use?
Safari and Google Chrome are the tools most closely tied to Firefox. Next is Microsoft Edge: 10% of these companies use it, against 0.24% of similar ones.
Share of the 1,541 Firefox companies counted here whose job posts also name the tool
Typical for companies the same size
Which companies started naming Firefox in job posts recently?
48 companies with 50 or more employees started naming Firefox in job posts between April and August 2026. 8 of them have more than 5,000 employees. COLSA has the most job posts of the new mid-market companies, 4 from April to August.
Companies that named Firefox in a job post for the first time between April and August 2026, ranked by their job posts in those months. AI-native companies get a group of their own, whatever their size. Recruiters and job boards are left out.
Which roles mention Firefox most?
No single role dominates for Firefox; IT Support leads with 21% of the job posts. The top four roles cover 43% of these job posts.
RoleSharePosts
IT Support
21%269
Software Development Engineer in Test
9.8%126
Customer Support
7.5%96
Software Engineer
5%64
Data Engineer
4.4%56
Outside Sales Representative
3%39
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
IT Support
21%
269
72
74
Software Development Engineer in Test
9.8%
126
33
38
Customer Support
7.5%
96
26
21
Software Engineer
5%
64
11
13
Data Engineer
4.4%
56
0
49
Outside Sales Representative
3%
39
21
6
Which project themes come up in Firefox job posts?
Apart from broad digital transformation work, Frontend Migration comes up most in job posts naming Firefox, in 18 of them. Broad digital transformation work shows up in 119 of its job posts.
Project themeJob posts
Digital Transformation119
Frontend Migration18
Data Infrastructure Migration11
Microservices Migration7
About this data
Sumble built this page. Sumble gives sales, marketing and other GTM teams technographics and hiring signals for the companies they sell to: the technologies each company uses, which teams are hiring and for what, and who reports to whom. That helps a team know who to contact, why now, and what to say.
Sumble covers more than 3.6 million companies, 93 million job posts collected since 2022 and 194 million employee profiles, and tracks more than 37,000 technologies. It finds which technologies a company uses by reading its job posts and its employees' public profiles.
Sumble has a free plan, and the same data is available through its API and MCP server.
A company counts when its own job posts or its employees' public profiles name the technology. Hiring is that technology's share of all job posts collected each month. Quotes are copied word for word from the companies' job posts.
Every figure on this page comes from Sumble's own analysis, and you won't find it outside Sumble.
