[dotnet][java][js][py][rb] remove deprecated Firefox profile extension and cert methods

[titusfortner]

🔗 Related Issues

Finishes work from #17871 & #13477

💥 What does this PR do?

Removes deprecated/invalid Firefox profile code (including extension and certificate management)

🔧 Implementation Notes

• Ruby's rexml is removed from the gemspec as a direct dependency, but it is kept as a transitive dev dependency

🤖 AI assistance

• AI assisted (complete below)
  • Tool(s): Claude Code (Opus 5)
  • What was generated: the cross-binding audit of what each deprecation left dead, the removals, and this description
  • I reviewed all AI output and can explain the change

💡 Additional Considerations

• Things in third_party can be cleaned up in a future PR

🔄 Types of changes

• Breaking change (following Selenium's deprecation policy)

[qodo-code-review]

PR Summary by Qodo

Remove deprecated Firefox profile APIs across language bindings

✨ Enhancement ⚙️ Configuration changes 🕐 20-40 Minutes

AI Description

• Removes deprecated Firefox profile extension installation APIs across five language bindings.
• Removes obsolete Java, Python, and Ruby profile certificate and legacy settings.
• Cleans related tests, build fixtures, signatures, and Ruby's direct REXML dependency.

Diagram

graph TD
  Legacy["Deprecated profile APIs"] -.-> DotNet[".NET binding"] & Java["Java binding"] & JavaScript["JavaScript binding"] & Python["Python binding"] & Ruby["Ruby binding"]
  DotNet & Java & JavaScript & Python & Ruby -->|"add-ons"| AddOn["Driver add-on API"]
  Java & Python & Ruby -->|"certificates"| Certs["Options certificates"]

Loading

High-Level Assessment

Direct removal is appropriate because these public APIs were already deprecated and supported replacements exist at the driver or options level. Retaining compatibility shims or runtime-failing methods would prolong dead profile-management code and preserve unnecessary parsing and dependency surfaces.

Files changed (13) +7 / -637

Refactor (7) +7 / -530

FirefoxProfile.csRemove profile-based Firefox extension installation +0/-32

Remove profile-based Firefox extension installation

• Removes the deprecated AddExtension API, extension registry, and profile-layout installation phase. Firefox profiles now serialize preferences and existing profile content without staging add-ons.

dotnet/src/webdriver/Firefox/FirefoxProfile.cs

FirefoxProfile.javaRemove deprecated extension and legacy profile settings +0/-126

Remove deprecated extension and legacy profile settings

• Removes extension registration and installation from profile layout. Also removes obsolete no-focus native-event methods and profile-level certificate setters in favor of supported session options.

java/src/org/openqa/selenium/firefox/FirefoxProfile.java

firefox.jsRemove Firefox Options profile extension support +7/-104

Remove Firefox Options profile extension support

• Removes add-on archive parsing, profile extension staging, AddonFormatError, and Options.addExtensions. Profile serialization now archives only an explicitly supplied template, and documentation demonstrates preference configuration instead.

javascript/selenium-webdriver/firefox.js

firefox_profile.pyRemove deprecated Python FirefoxProfile APIs +0/-215

Remove deprecated Python FirefoxProfile APIs

• Removes profile-based add-on installation and manifest parsing, including AddonFormatError. Also removes deprecated port and untrusted-certificate properties now owned by Service and Options.

py/selenium/webdriver/firefox/firefox_profile.py

firefox.rbStop loading the removed Ruby extension implementation +0/-2

Stop loading the removed Ruby extension implementation

• Removes the REXML document require and Firefox::Extension autoload because profile extension parsing has been deleted.

rb/lib/selenium/webdriver/firefox.rb

profile.rbRemove deprecated Ruby profile extension and legacy settings +0/-37

Remove deprecated Ruby profile extension and legacy settings

• Removes extension tracking, installation, and name derivation from profile layout. Also removes deprecated port, secure SSL, and no-focus setters.

rb/lib/selenium/webdriver/firefox/profile.rb

profile.rbsSynchronize Ruby profile signatures with API removals +0/-14

Synchronize Ruby profile signatures with API removals

• Removes extension state and methods plus deprecated port, secure SSL, and no-focus writer declarations from the Firefox Profile RBS definition.

rb/sig/lib/selenium/webdriver/firefox/profile.rbs

Tests (2) +0 / -88

FirefoxProfileTest.javaRemove tests for deprecated profile extension installation +0/-32

Remove tests for deprecated profile extension installation

• Deletes tests for installing Firefox extensions from XPI files, directories, and classpath resources, along with their unused imports and fixture constants.

java/test/org/openqa/selenium/firefox/FirefoxProfileTest.java

options_test.jsRemove JavaScript addExtensions integration coverage +0/-56

Remove JavaScript addExtensions integration coverage

• Deletes Firefox Options tests for installing extensions into new and custom profiles. Associated extension resources, element assertions, and imports are also removed.

javascript/selenium-webdriver/test/firefox/options_test.js

Other (4) +0 / -19

BUILD.bazelDrop Java extension-test fixtures and dependencies +0/-12

Drop Java extension-test fixtures and dependencies

• Removes the copied XPI fixture, extension data targets, and build-helper dependency that were only needed by deleted FirefoxProfile extension tests.

java/test/org/openqa/selenium/firefox/BUILD.bazel

Gemfile.lockRemove direct REXML runtime dependency +0/-1

Remove direct REXML runtime dependency

• Updates the locked selenium-webdriver dependency list so REXML is no longer required directly at runtime.

rb/Gemfile.lock

selenium-webdriver.gemspecDrop REXML from runtime gem dependencies +0/-1

Drop REXML from runtime gem dependencies

• Removes the direct REXML dependency after deleting the Firefox extension RDF parser. REXML remains available transitively for development where required.

rb/selenium-webdriver.gemspec

BUILD.bazelRemove obsolete Ruby extension test data +0/-5

Remove obsolete Ruby extension test data

• Drops legacy Firebug XPI fixtures from the Ruby unit-test target because extension parser coverage has been removed.

rb/spec/unit/BUILD.bazel

[qodo-code-review]

Code Review by Qodo

🐞 Bugs (0) 📘 Rule violations (1) 📜 Skill insights (0)

1. Java users lose an undeprecated API 📘 Rule violation ≡ Correctness

Description

The public containsWebDriverExtension() method is removed even though it has no @Deprecated
annotation or migration message. Existing callers compiling or linking against FirefoxProfile lose
this query on upgrade, while the adjacent extension APIs had explicit deprecation markers and
replacements.

Code

java/src/org/openqa/selenium/firefox/FirefoxProfile.java[L147-149]

-  public boolean containsWebDriverExtension() {
-    return extensions.containsKey("webdriver");
-  }

Evidence

PR Compliance ID 1 permits public API removal only after the documented deprecation process. The
removed method is public but has neither the @Deprecated annotation nor a message identifying a
supported alternative, unlike the extension methods immediately following it.

AGENTS.md: Preserve Public API and ABI Compatibility
java/src/org/openqa/selenium/firefox/FirefoxProfile.java[147-155]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

## Issue description
The public `containsWebDriverExtension()` API is being removed without first completing a documented deprecation cycle or giving callers migration guidance.

## Fix Focus Areas
- java/src/org/openqa/selenium/firefox/FirefoxProfile.java[147-149]

## Recommended Fix
Restore `containsWebDriverExtension()` for the current release, mark it for removal, and provide a deprecation message identifying the supported replacement or migration path before removing it in a later breaking release.

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

---

Context sources

Review mode: 🧠 Deep: This is a cross-language, breaking public API removal with 49 edit sites across multiple Firefox profile and extension code paths, creating substantial opportunity for independent compatibility or build defects.

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