Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

[WebExtensions] Document Firefox and Safari support for DNR header "append" modification

Open Beginner friendly
#46,233 0 comments 0 reactions 0 assignees View on GitHub

Maintainers usually reply within 1 day

Nobody has claimed this yet.

Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
74/100
Issue type
Documentation
Clarity
Mostly clear
Activity status
Active
Tech stack
javascript
Domain
documentation

Research direction

Find the MDN content file for the ModifyHeaderInfo API page linked in the issue and read its existing browser compatibility section. Check the support data or references used by nearby DNR documentation for Firefox and Safari’s support for the append header modification. Done when the page lists accurate support information for both browsers.

Written by the indexing model from the issue text.

Description

Content:WebExt needs triage
MDN URL

https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/declarativeNetRequest/ModifyHeaderInfo

What specific section or headline is this issue about?

N/A

What information was incorrect, unhelpful, or incomplete?

Missing information about Firefox and Safari support.

What did you expect to see?

List for Safari and Firefox.

Do you have any supporting links, references, or citations?

No response

Do you have anything more you want to share?

No response

Dominant language
Markdown
Stars
11.1k
Forks
23.3k
Avg merge
2d 14h
Merged PRs (30d)
214

Getting set up

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from mdn/content

All issues in mdn/content

Similar issues

More Documentation issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.