# Companies using Firefox

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.

Data as of November 9, 2026. Source: Sumble.

## 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.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Amazon](https://sumble.com/orgs/amazon) | 718 | 42 | "Knowledge of Knowledge of Windows desktop environment and use of Word, Excel, IE, Firefox etc" (Staff Pharmacist, Amazon Pharmacy, Oct 22, 2026) |
| [ASPIRE DERMATOLOGY](https://sumble.com/orgs/aspire-dermatology) | 147 | 0 | "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 Inc](https://sumble.com/orgs/caci-international-1) | 136 | 2 | "…Office products, and various Internet browsers to include Internet Explorer and Mozilla Firefox" (Senior End User Technician, Nov 1, 2026) |
| [AutoZone](https://sumble.com/orgs/autozone) | 132 | 0 | "Skilled in using common internet browsers such as Internet Explorer, Firefox, Chrome, and Safari." (Field Sales Representative, May 13, 2026) |
| [ALLDATA](https://sumble.com/orgs/alldata) | 109 | 1 | "Skilled in using common internet browsers such as Internet Explorer, Firefox, Chrome, and Safari." (Field Sales Representative, Nov 4, 2026) |

## Is hiring for Firefox growing?

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.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| 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.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 47 |
| June to August 2026 | 43 |
| October 2025 to August 2026 | 187 |

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 know | Companies | Share |
|---|---:|---:|
| Job posts name Firefox | 2,245 | 23% |
| Employees' profiles list Firefox | 7,623 | 77% |

## 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%.

| Size | Share | Typical tech page |
|---|---:|---:|
| 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%.

| 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.

| Team | Companies |
|---|---:|
| IT | 57 |
| QA | 16 |
| Development | 10 |
| FSS | 9 |
| Operations | 9 |
| Service desk | 9 |

## 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.

| 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 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.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| Commercial | [Shopbop](https://sumble.com/orgs/shopbop) | 3 |
| Commercial | [Dynamo Technologies, LLC](https://sumble.com/orgs/dynamo-technologies) | 3 |
| Commercial | [ChapsVision](https://sumble.com/orgs/chaps-vision) | 2 |
| Commercial | [BrickRed Systems](https://sumble.com/orgs/brickred-systems) | 2 |
| Commercial | [Fora Financial](https://sumble.com/orgs/fora-financial) | 2 |
| Mid-market | [COLSA](https://sumble.com/orgs/colsa) | 4 |
| Mid-market | [Fulcrum Digital Inc](https://sumble.com/orgs/fulcrum-worldwide) | 3 |
| Mid-market | [Salt River Project](https://sumble.com/orgs/srp-9cc16897) | 2 |
| Mid-market | [Neosoft](https://sumble.com/orgs/neo-soft) | 2 |
| Mid-market | [State of Vermont](https://sumble.com/orgs/state-of-vermont) | 1 |
| Enterprise | [BNY](https://sumble.com/orgs/bny-mellon) | 2 |
| Enterprise | [Quest Global](https://sumble.com/orgs/quest-global-a3640728) | 2 |
| Enterprise | [Deloitte](https://sumble.com/orgs/deloitte) | 1 |
| Enterprise | [FPT Software](https://sumble.com/orgs/fpt-software) | 1 |
| Enterprise | [Synechron](https://sumble.com/orgs/synechron) | 1 |

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.

## 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.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Safari | 561 | 36% | 0.29% | 125 times |
| Google Chrome | 1,315 | 85% | 1.5% | 58 times |
| Microsoft Edge | 159 | 10% | 0.24% | 43 times |
| Microsoft Internet Explorer | 519 | 34% | 1.7% | 20 times |
| Microsoft SharePoint Designer | 84 | 5.5% | 0.46% | 12 times |
| Fortify | 83 | 5.4% | 0.67% | 8 times |
| Trellix | 84 | 5.5% | 0.68% | 8 times |
| Apache Struts | 99 | 6.4% | 0.82% | 7.9 times |

Shares are out of the 1,541 companies whose job posts name Firefox, not counting firms whose job posts name almost every technology.

## 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 theme | Job posts |
|---|---:|
| Digital Transformation | 119 |
| Frontend Migration | 18 |
| Data Infrastructure Migration | 11 |
| Microservices Migration | 7 |

## 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.