Firefox user.js for optimal privacy and security. Your favorite browser, but better.
This report summarizes scanner evidence for yokoffing/Betterfox, a JavaScript project with 10,919 GitHub stars. SynthScan examined 4,220 lines of code across 13 source files, recording 135 pattern matches distributed across 5 syntactic categories. The legacy adjusted pattern signal is 25.1 (Elevated pattern signal); it is not an authorship estimate.
Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.
Use each vector to guide manual verification of the underlying findings.
Can maintainers explain intent, assumptions, and trade-offs? 132 finding(s).
Are imports declared and package/API names verified? 2 finding(s).
Are wrappers, guards, and repeated structures necessary? 4 finding(s).
Which changes need focused human review? 135 finding(s).
This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.
Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.
This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.
The scanner identified 135 distinct pattern matches across 5 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.
Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | Fastfox.js | 21 | // [4] https://reddit.com/r/browsers/s/wvNB7UVCpx | COMMENT |
| LOW | Fastfox.js | 41 | COMMENT | |
| LOW | Fastfox.js | 61 | //user_pref("content.switch.threshold", 300000); // HIDDEN; default= 750000; alt=500000 | COMMENT |
| LOW | Fastfox.js | 81 | // false=Tabs begin to load immediately. | COMMENT |
| LOW | Fastfox.js | 101 | //user_pref("gfx.webrender.compositor", true); // DEFAULT WINDOWS macOS | COMMENT |
| LOW | Fastfox.js | 121 | // by utilizing WebGL instead of relying upon Direct2D. | COMMENT |
| LOW | Fastfox.js | 141 | // (ICs) to both speed up execution and collect type info for the Ion optimizing JIT. | COMMENT |
| LOW | Fastfox.js | 161 | // Example (24-thread CPU): divisor 1 → 24 threads | 2 → 12 | 4 (default) → 6 | 12 → 2 | COMMENT |
| LOW | Fastfox.js | 181 | COMMENT | |
| LOW | Fastfox.js | 201 | // often a page has been accessed and is used by Firefox's cache algorithm. | COMMENT |
| LOW | Fastfox.js | 221 | // 3 = when-appropriate/automatically (default) | COMMENT |
| LOW | Fastfox.js | 241 | // PREF: strategy to use for when the bytecode should be encoded and saved [TESTING ONLY] | COMMENT |
| LOW | Fastfox.js | 261 | // Value can be up to the max size of an unsigned 64-bit integer. | COMMENT |
| LOW | Fastfox.js | 281 | //user_pref("browser.sessionstore.max_tabs_undo", 10); // default=25 | COMMENT |
| LOW | Fastfox.js | 301 | // PREF: Media Source Extensions (MSE) web standard | COMMENT |
| LOW | Fastfox.js | 321 | user_pref("image.mem.decode_bytes_at_a_time", 32768); // default=16384; chunk size for calls to the image decoders | COMMENT |
| LOW | Fastfox.js | 341 | // [3] https://ra1ahq.blog/en/optimizaciya-proizvoditelnosti-mozilla-firefox | COMMENT |
| LOW | Fastfox.js | 361 | // If you have a fast machine and internet connection, disabling pacing | COMMENT |
| LOW | Fastfox.js | 381 | //user_pref("network.dns.max_any_priority_threads", 24); // DEFAULT [FF 123?] | COMMENT |
| LOW | Fastfox.js | 401 | // this value (in MiB). | COMMENT |
| LOW | Fastfox.js | 421 | COMMENT | |
| LOW | Fastfox.js | 441 | // OPTION 1: isolate all websites | COMMENT |
| LOW | Fastfox.js | 461 | // similar to the non-Fission behavior; however, remote subframes may still | COMMENT |
| LOW | Securefox.js | 21 | // [3] https://www.reddit.com/r/firefox/comments/l7xetb/network_priority_for_firefoxs_enhanced_tracking/gle2mqn/?web2x&c | COMMENT |
| LOW | Securefox.js | 41 | //user_pref("privacy.bounceTrackingProtection.mode", 1); // [FF131+] [ETP FF133+] | COMMENT |
| LOW | Securefox.js | 61 | //user_pref("privacy.trackingprotection.allow_list.baseline.enabled", true); // [DEFAULT: true] | COMMENT |
| LOW | Securefox.js | 81 | // [2] https://www.youtube.com/watch?v=VE8SrClOTgw | COMMENT |
| LOW | Securefox.js | 101 | // [5] https://hg.mozilla.org/mozilla-central/file/tip/dom/ipc/ProcessIsolation.cpp#l53 | COMMENT |
| LOW | Securefox.js | 121 | // Alt-Svc cache, and TLS certificate cache. | COMMENT |
| LOW | Securefox.js | 141 | // [3] https://blog.mozilla.org/security/2021/01/26/supercookie-protections/ | COMMENT |
| LOW | Securefox.js | 161 | // Currently, the absence of the SameSite attribute implies that cookies will be | COMMENT |
| LOW | Securefox.js | 181 | //user_pref("browser.send_pings", false); // DEFAULT | COMMENT |
| LOW | Securefox.js | 201 | // PREF: remove temp files opened from non-PB windows with an external application | COMMENT |
| LOW | Securefox.js | 221 | // [SETTING] Privacy & Security > Website Privacy Preferences > Tell websites not to sell or share my data | COMMENT |
| LOW | Securefox.js | 241 | // OCSP is vulnerable to replay attacks when nonce is not configured on the OCSP responder. | COMMENT |
| LOW | Securefox.js | 261 | // PREF: set OCSP fetch failures to hard-fail | COMMENT |
| LOW | Securefox.js | 281 | // 3 = consult CRLite and enforce "Not Revoked" results, but defer to OCSP for "Revoked" (removed FF145) | COMMENT |
| LOW | Securefox.js | 301 | // [1] https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/16206 | COMMENT |
| LOW | Securefox.js | 341 | // PREF: require safe negotiation | COMMENT |
| LOW | Securefox.js | 361 | // [TEST] https://expired.badssl.com/ | COMMENT |
| LOW | Securefox.js | 381 | COMMENT | |
| LOW | Securefox.js | 401 | //user_pref("privacy.window.maxInnerWidth", 1600); | COMMENT |
| LOW | Securefox.js | 421 | // PREF: disk cache | COMMENT |
| LOW | Securefox.js | 441 | // Work has been done to mitigate potential performance drawbacks of frequent session saving [3]. | COMMENT |
| LOW | Securefox.js | 461 | //user_pref("browser.shell.shortcutFavicons", false); | COMMENT |
| LOW | Securefox.js | 481 | // [SETTING] Privacy & Security>Browser Privacy>Cookies and Site Data>Clear Data | COMMENT |
| LOW | Securefox.js | 501 | //user_pref("privacy.clearHistory.cookiesAndStorage", false); | COMMENT |
| LOW | Securefox.js | 521 | COMMENT | |
| LOW | Securefox.js | 541 | //user_pref("privacy.clearOnShutdown_v2.cache", true); // [FF128+] [DEFAULT] | COMMENT |
| LOW | Securefox.js | 561 | //user_pref("privacy.clearOnShutdown.cookies", true); // Cookies | COMMENT |
| LOW | Securefox.js | 581 | COMMENT | |
| LOW | Securefox.js | 601 | // [1] https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections?redirectslug=how-stop-firefox- | COMMENT |
| LOW | Securefox.js | 621 | // Disable speculative DNS calls to prevent Firefox from resolving | COMMENT |
| LOW | Securefox.js | 641 | // PREF: mousedown speculative connections on bookmarks and history [FF98+] | COMMENT |
| LOW | Securefox.js | 661 | // The browser prefetches links with the prefetch-link tag, fetching resources | COMMENT |
| LOW | Securefox.js | 681 | //user_pref("network.fetchpriority.enabled", true); | COMMENT |
| LOW | Securefox.js | 701 | // PREF: darken certain parts of the URL [FF75+] | COMMENT |
| LOW | Securefox.js | 721 | //user_pref("security.insecure_connection_text.pbmode.enabled", true); // [DEFAULT FF136+] | COMMENT |
| LOW | Securefox.js | 741 | // [2] https://www.mozilla.org/en-US/firefox/140.0/releasenotes/ | COMMENT |
| LOW | Securefox.js | 761 | // hide Firefox Suggest label in URL dropdown box | COMMENT |
| 67 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| HIGH | install.py | 37 | - CMD: `pyinstaller --onefile --name install-betterfox install.py && move %cd%\\dist\\install-betterfox.exe %cd% && d | STRING |
| HIGH | install.py | 38 | - BASH: `pyinstaller --onefile --name install-betterfox install.py && && mv dist/install-betterfox.exe . && rm install | STRING |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW⚡ | install.py | 81 | def _get_default_firefox_version_and_root(): | CODE |
| LOW⚡ | install.py | 96 | def _get_default_profile_folder(firefox_root): | CODE |
| LOW | install.py | 156 | def _get_latest_compatible_release(releases): | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | install.py | 96 | CODE | |
| LOW | install.py | 124 | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW⚡ | install.py | 90 | except Exception: | CODE |