Examine source code of Redirectify

{
  "manifest_version": 2,
  "name": "Redirectify",
  "version": "0.3.2",
  "description": "Redirects requests for PDFs of papers at some popular sites to their corresponding HTML index pages.",
  "homepage_url": "https://github.com/imurray/redirectify",
  "permissions": [
    "*://*.arxiv.org/pdf/*",
    "*://*.inspirehep.net/*",
    "*://xxx.lanl.gov/*",
    "*://arxiv-export-lb.library.cornell.edu/pdf/*",
    "*://arxiv.org/ftp/*pdf",
    "*://*.openreview.net/pdf*",
    "*://proceedings.mlr.press/*.pdf",
    "*://*.jmlr.org/papers/*.pdf",
    "*://jmlr.csail.mit.edu/papers/*.pdf",
    "*://dl.acm.org/doi/pdf/*",
    "*://*.acm.org/*",
    "*://papers.nips.cc/*.pdf",
    "*://papers.neurips.cc/*.pdf",
    "*://proceedings.nips.cc/*.pdf",
    "*://proceedings.neurips.cc/*.pdf",
    "*://pdfs.semanticscholar.org/*",
    "*://*.semanticscholar.org/*",
    "*://*.biorxiv.org/content*",
    "*://indico.cern.ch/event/*/attachments/*.pdf",
    "*://indico.fnal.gov/event/*/attachments/*.pdf",
    "*://cds.cern.ch/record/*/files/*.pdf",
    "*://www.jstor.org/stable/pdf/*",
    "*://*.projecteuclid.org/download/pdf*",
    "*://*.projecteuclid.org/*/Download*",
    "*://*.projecteuclid.org/getRecord?id=euclid.*",
    "*://www.researchgate.net/profile/*pdf",
    "*://citeseer.ist.psu.edu/viewdoc/download*type=pdf",
    "*://citeseerx.ist.psu.edu/viewdoc/download*type=pdf",
    "*://www.aclweb.org/anthology/*.pdf",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "redirectify.js"
    ]
  }
}