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Mozilla Firefox vs Mullvad VPN

Mozilla Firefox logo

Mozilla Firefox

Technology

An independent web browser with its own rendering engine, funded almost entirely by search placement deals.

From
Free
Rated
-
Full reviewWebsite
M

Mullvad VPN

Cybersecurity

Privacy-first VPN with one flat price and no email required to sign up

From
$5/month
Rated
-
Full reviewWebsite

The short version

  • Only Mozilla Firefox has a free tier, so it costs nothing to try first.
  • Each has a real cost: Mozilla Firefox roughly 85 per cent of Mozilla's revenue comes from search default placement deals, overwhelmingly with Google, so the organisation that competes with Chrome depends on Chrome's owner for its funding and any renegotiation lands on Firefox's engineering budget within a quarter.; Mullvad VPN offers no free trial or free tier, unlike several consumer VPN competitors.
  • They diverge on capability: Mozilla Firefox covers Gecko engine, Mullvad VPN covers Flat single pricing.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Mozilla Firefox and Mullvad VPN actually diverge.

Attributes where Mozilla Firefox and Mullvad VPN differ
AttributeMozilla FirefoxMullvad VPN
Starting priceFree$5/month
Pricing modelUnknownsubscription
Free tierYesNo
PlatformsWindows, macOS, Linux, iOS, Androidwindows, mac, linux, ios, android
CategoryTechnologyCybersecurity
Founded20042009

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Mozilla Firefox

  • Gecko engine
  • Full webRequest blocking
  • Total Cookie Protection
  • Container tabs
  • Extended Support Release
  • policies.json and ADMX
  • Built-in developer tools
  • Firefox Sync

Only in Mullvad VPN

  • Flat single pricing
  • Account-number signup
  • Cash and crypto payments
  • WireGuard support
  • Independent audits

What people use each for

The jobs each tool is most often brought in to do.

Mozilla Firefox

  • Web development where you need to test against a non-Chromium engine before shipping, because Chromium-only testing hides real bugsnot Mullvad VPN
  • Users who require a full-strength content blocker, which Chrome's Manifest V3 no longer permitsnot Mullvad VPN
  • Managed fleets that need a browser on a slow release cadence with Group Policy control, using the ESR channelnot Mullvad VPN
  • Handling several accounts on the same service at once through container tabs, without separate profiles or private windowsnot Mullvad VPN

Mullvad VPN

  • Paying for a VPN anonymously with cash or cryptocurrencynot Mozilla Firefox
  • Avoiding tiered upsells with a single flat-rate plannot Mozilla Firefox
  • Signing up without providing an email addressnot Mozilla Firefox
  • Verifying a provider's privacy claims via independent auditsnot Mozilla Firefox

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Mozilla Firefox

  • Roughly 85 per cent of Mozilla's revenue comes from search default placement deals, overwhelmingly with Google, so the organisation that competes with Chrome depends on Chrome's owner for its funding and any renegotiation lands on Firefox's engineering budget within a quarter.
  • Desktop market share sits at a few per cent, so commercial sites are tested against Chrome and Safari and a Firefox-only rendering or WebRTC bug is triaged as low priority by the site owner, leaving you with the workaround.
  • On iOS and iPadOS the browser is a WebKit shell required by Apple's rules, so it delivers the interface and Sync but none of the engine, extension or tracking-protection behaviour that make Firefox worth choosing on desktop.
  • Mozilla declines to implement several hardware-facing APIs on principle, including WebUSB, WebSerial, Web Bluetooth and WebHID, so a web application that talks to a device simply does not run and no configuration flag changes that.
  • Enterprise management is limited to policies.json and ADMX templates; there is no first-party equivalent of Chrome Browser Cloud Management, so fleet-wide reporting on versions and extensions requires third-party tooling you have to buy or build.
  • Mozilla repeatedly ships decisions its own user base objects to, such as enabling Privacy Preserving Attribution by default and the 2025 Terms of Use rewrite, and reversals arrive after the news cycle, so deploying it on a privacy argument means owning the communications work each time.

Mullvad VPN

  • Offers no free trial or free tier, unlike several consumer VPN competitors.
  • Lacks a bundled tiered structure, so there is no cheaper limited plan for occasional users.
  • Server network and streaming-unblocking performance is smaller than large mainstream VPN providers.
  • No annual discount, meaning long-term subscribers pay the same monthly rate as short-term users.

Pricing, plan by plan

Mozilla Firefox

Free

No published plan breakdown. See the Mozilla Firefox review.

Mullvad VPN

$5/month
  • Mullvad VPN$5/month
    • Flat rate regardless of subscription length
    • 5 simultaneous devices
    • No email required

Which should you pick?

Choose Mozilla Firefox if

  • You need gecko engine.
  • You want to start without paying.
  • You work on Windows, macOS, Linux, iOS, Android.
  • You also want full webrequest blocking.
Mozilla Firefox review

Choose Mullvad VPN if

  • You need flat single pricing.
  • You work on windows, mac, linux, ios, android.
  • You also want account-number signup.
Mullvad VPN review

Questions people ask

Is Mozilla Firefox or Mullvad VPN better?
Neither clearly leads. Mozilla Firefox starts at Free and Mullvad VPN at $5/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Mozilla Firefox or Mullvad VPN?
Mozilla Firefox has a free tier; the other does not. Paid plans start at Free for Mozilla Firefox and $5/month for Mullvad VPN.
Does Mozilla Firefox or Mullvad VPN run on more platforms?
Mozilla Firefox runs on Windows, macOS, Linux, iOS, Android. Mullvad VPN runs on windows, mac, linux, ios, android.
Can I use Mozilla Firefox for free?
Yes. Mozilla Firefox has a free tier, so you can try it without paying. Mullvad VPN starts at $5/month.
What is Mozilla Firefox best used for?
Mozilla Firefox is most often used for web development where you need to test against a non-chromium engine before shipping, because chromium-only testing hides real bugs, users who require a full-strength content blocker, which chrome's manifest v3 no longer permits, managed fleets that need a browser on a slow release cadence with group policy control, using the esr channel, handling several accounts on the same service at once through container tabs, without separate profiles or private windows. Of those, web development where you need to test against a non-chromium engine before shipping, because chromium-only testing hides real bugs and users who require a full-strength content blocker, which chrome's manifest v3 no longer permits are not what Mullvad VPN is typically brought in for.
What can Mozilla Firefox do that Mullvad VPN cannot?
Mozilla Firefox covers Gecko engine, Full webRequest blocking, Total Cookie Protection, Container tabs. Mullvad VPN covers Flat single pricing, Account-number signup, Cash and crypto payments, WireGuard support.

Answered from the vendors’ own pages

Mozilla Firefox: Does uBlock Origin still work on Firefox?

Yes. Firefox has kept the blocking webRequest API that Chrome removed with Manifest V3, so uBlock Origin runs with its full rule set rather than the cut-down Lite version Chrome requires.

Mozilla Firefox: Is Firefox on iPhone the same browser?

No. Apple's platform rules require it to use WebKit, so on iOS and iPadOS you get Firefox's interface, Sync and bookmarks on top of Safari's engine. The privacy and extension behaviour are not the same.

Mozilla Firefox: How is Mozilla funded, and does that matter?

Mainly by payments for making a search engine the default, with Google as the dominant payer. It matters because it is a single-source dependency on a direct competitor, and it has been the subject of antitrust litigation whose outcome Mozilla does not control.

Mozilla Firefox: Can I manage it across a company fleet?

Yes, through policies.json or Windows Group Policy with the ADMX templates, and the ESR channel gives you a roughly yearly major version instead of four-weekly. There is no first-party cloud management console, so reporting needs other tooling.

Mozilla Firefox: Will every site work in it?

Most will. The exceptions cluster around sites tested only in Chrome, legacy enterprise applications, and anything using WebUSB, WebSerial, Web Bluetooth or WebHID, which Firefox does not implement at all.

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