Mozilla Foundation

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Improve and protect the internet as a public resource open and accessible to all

Form 990 Part I, line 1, FY2024. The organization’s own words, as filed with the IRS. Find it at the IRS (EIN 20-0097189) · Dispute this line
501(c)(3) charity; gifts are tax-deductible.
66¢ of each $1 spent went to programs.
Run by 10,000 volunteers and 47 employees.
Mission: Form 990 Part I, line 1 · Status: IRS Pub. 78 · Programs: Part IX · People: Part I, lines 5–6

Before you give

FY2024 · Form 990Independent: from IRS data, not the org
Download 990
IRS status
501(c)(3)
not on the IRS revocation list
Listed by the IRS and not on the revocation list.
IRS BMF · Auto-Revocation List
Tax-deductible gifts
Yes
Donations are tax-deductible
The IRS lists gifts to it as deductible.
IRS Pub. 78 · IRS BMF
Latest return
FY2024
latest Form 990
The latest return is for FY2024, 2 tax years back.
IRS e-file · Filing history
Surplus or deficit
4 of 5
filings with a surplus
Average surplus $11.2M a year · 27% of revenue · last 5 filings
A surplus in 4 of the last 5 filings.
Pt I · Ln 19 · 5 filings
Spent on programs
66%
of spending
66% of spending went to programs.
Pt IX · Ln 25 · col B
Pay to officers and key staff
$3.7M
to officers and key staff · 9% of spending
Pay to officers and key staff is 9% of spending.
Part VII, Section A
Named funders
2
named funders · $363
2 funders name it on their filings.
Funders’ Sch. I, 990-PF
Liabilities
$5.8M
5% of total assets
Liabilities are 5% of assets.
Pt X · Ln 26
Revenue
$37.2M
-43% vs prior year
Spent
$41.2M
To programs
66%
Net assets
$117.5M
By yearFY2020–FY2024
Revenue
$37.2M
FY2024▼ -43%
Tap a bar for its year
Revenue by fiscal year
FY2020$26.5M
FY2021$30.7M
FY2022$49.7M
FY2023$64.7M
FY2024$37.2M
Expenses
$41.2M
FY2024▲ +3%
Tap a bar for its year
Expenses by fiscal year
FY2020$18.2M
FY2021$23.3M
FY2022$30.3M
FY2023$39.8M
FY2024$41.2M
Net assets
$117.5M
FY2024-0.3%
Tap a bar for its year
Net assets by fiscal year
FY2020$64.5M
FY2021$74.5M
FY2022$89.4M
FY2023$118.0M
FY2024$117.5M

From the FY2024 Form 990 · figures checked against the IRS filing · see the original

Is it real?

Yes. Never revoked by the IRS. Latest filing on record: FY2024. IRS ruling in Jun 2004.

IRS Pub. 78 · IRS Auto-Revocation List · IRS Business Master File

Where the money goes

66 cents of each dollar spent went to programs.

Program services 66% · $27.4M Management & general 26% · $10.8M Fundraising 7% · $3.1M

Form 990 Part IX, line 25, columns B–D. Every line is in By the numbers.

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Who runs it and what they're paid

19 people listed on the 990; $3.7M paid to officers and key staff (Part VII, Section A).

Part VII, Section A · reportable compensation
President, Director
$610,704Pt VII · Sec A
SVP, Global Programs
$434,746Pt VII · Sec A
COO, Secretary & Treasurer
$363,756Pt VII · Sec A
Executive Director (beg 04/2024)
$310,566Pt VII · Sec A
SVP, Global Advocacy
$309,984Pt VII · Sec A
Dir., Organizational Effectiveness
$281,271Pt VII · Sec A
SR. Lead, Partnerships + Fundraising
$260,056Pt VII · Sec A
Senior Counsel
$230,654Pt VII · Sec A

Mark Surman’s $611K as President, Director is at the 82nd percentile of top reported officer pay among 139 $10–100M science & technology nonprofits. Peer set: organizations in the same NTEE major field of work and revenue-size band, compared on each org’s own highest-paid officer/key-employee, from Form 990 Part VII / 990-PF Part VIII. Descriptive placement, not a verdict on whether the pay is appropriate.

Compensation history total reportable pay by year · 8 named individuals · Part VII

NameFY2024FY2023FY2022FY2021FY2020
Mark Surman$610,704$661,886$344,483$337,714$299,228
J Bob Alotta$434,746$417,327$314,036$294,489$285,514
Angela Plohman$363,756$415,549$246,486$242,929$214,755
Ashley Boyd$309,984$368,445$304,915$266,262$246,817
Nabiha Syed$310,566————
Lainie Decoursy$281,271$200,137$169,846$132,925—
Jessica Keating$260,056————
David Walker$230,654$219,117$212,153——

Total reportable compensation (Form 990 Part VII column D / Schedule J column E) by filing year, matched by name within this organization. The Schedule J base / bonus / deferred breakdown is not parsed into this dataset.

See Mozilla Foundation executive salaries →

Programs and updates

Supports global leaders and projects through grants and fellowships to ensure the internet remains a safe, open, and trustworthy public resource.

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3 programs · $27.4M · in their own filed words · FY2024
01

Movement building Mozilla fuels the movement for a better internet, building bridges between digital rights activists, open-source champions, and other communities. In 2024, Mozilla published our * privacy not included guide with a focus on privacy in dating apps, as well as ai chatbots, published a range of petitions and open letters…

Form 990 Part III, line 4, FY2024. The organization’s own words, as filed with the IRS. Find it at the IRS (EIN 20-0097189) · Dispute this line
$15.6Mprogram expense
02

Leadership development Mozilla supports people and projects making ai more trustworthy and the internet healthier. In 2024, Mozilla welcomed several new fellows and awardees working at the intersection of ai and climate justice, public policy, ethics, art, and a range of other topics.

Form 990 Part III, line 4, FY2024. The organization’s own words, as filed with the IRS. Find it at the IRS (EIN 20-0097189) · Dispute this line
$11.0Mprogram expense
03

Agenda setting Mozilla researches issues at the intersection of technology and society and then propels them into the public conversation. In 2024, Mozilla provided research, commentary, and analysis on topics like openness in ai, the environmental impacts of ai, protecting consumer privacy, and upholding online information integrity on…

Form 990 Part III, line 4, FY2024. The organization’s own words, as filed with the IRS. Find it at the IRS (EIN 20-0097189) · Dispute this line
$750Kprogram expense

Funders

Who pays for it.

From grant filings on record. Receipts are incomplete: individual donors are never listed.

Grants

Schedule I · received and paid
Grants received · FY2025
Total grants receivedfrom 2 funders$363
Grants paid · 125 grants · $9.5M · 2020–2023
See all 125 grants →

Federal money

Single Audit · Federal Audit Clearinghouse · money spent from federal programs
Year ending Dec 2018 · $3.3M federal money spent
Computer and Information Science and EngineeringNational Science Foundation · ALN 47.070 · Direct$3.3M
Laura Bush 21st Century Librarian ProgramNational Endowments for the Arts and Humanities · ALN 45.313 · Direct$26K

The auditor reported no findings.

Year ending Dec 2017 · $2.1M federal money spent
Computer and Information Science and EngineeringNational Science Foundation · ALN 47.070 · Direct$1.8M
Laura Bush 21st Century Librarian ProgramNational Endowments for the Arts and Humanities · ALN 45.313 · Direct$309K

The auditor reported no findings.

Year ending Dec 2016 · $1.3M federal money spent
Computer and Information Science and EngineeringNational Science Foundation · ALN 47.070 · Direct and through Drexel University$843K
Laura Bush 21st Century Librarian ProgramNational Endowments for the Arts and Humanities · ALN 45.313 · Direct$472K

The auditor reported no findings.

By the numbers

The FY2024 990, line by line.

1The main four
Money inPt VIII
$37.2M
Ln 12
Other incomeLn 4–11$30.7M
Gifts and grantsLn 1h$6.5M
Money outPt IX
$41.2M
Ln 25
Programscol B$27.4M
Managementcol C$10.8M
Fundraisingcol D$3.1M
Owns and owesPt X
$117.5M
net assets · Ln 32
Total assetsLn 16$123.3M
LiabilitiesLn 26$5.8M
PeoplePt VI, VII
19
listed · VII A
PaidVII A18
2In more detail
Revenue in detailPt VIII
Gifts and grantsLn 1h$6.5M
Other incomeLn 4–11$30.7M
Total revenueLn 12$37.2M
Assets in detailPt X, end of year
Total assetsLn 16$123.3M
LiabilitiesLn 26$5.8M
Net assetsLn 32$117.5M
OperationsPt I, VI
EmployeesI 547
VolunteersI 610,000
Fiscal year endsHeaderDecember
3Year over year
Business incomeForm 990-T, Part I
LineFY24
Gross$2.1M
Net$2.1M
Tax$365K

Filing history

YearMoney inMoney outIn minus outNet assetsDownload
FY2024 Latest ViewingFiled with the IRS Nov 17, 2025 $37.2M$41.2M−$4.0M$117.5M 990 PDF
FY2023Filed with the IRS Nov 15, 2024 $64.7M$39.8M$24.8M$118.0M 990 PDF
FY2022Filed with the IRS Nov 15, 2023 $49.7M$30.3M$19.5M$89.4M 990 PDF
FY2021Filed with the IRS Nov 15, 2022 $30.7M$23.3M$7.3M$74.5M 990 PDF
FY2020Filed with the IRS Nov 15, 2021 $26.5M$18.2M$8.4M$64.5M 990 PDF

Schedules filed Part IV

A · Public support J · Pay O · Explanations

Form 990 e-file FY2024 from the IRS (about our sources) · Classification, formation year and address from the IRS Business Master File

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