Issues - JShelter/webextension

#171 FPD does not work with Javascript JIT disabled (chromium).

Opened Feb 13, 2026 by kpanic. Modified Feb 13, 2026

#170 Jshelter breaks lmarena.ai / arena.ai

Opened Feb 12, 2026 by bojanga. Modified Feb 12, 2026

#168 Breaks reCaptcha on Firefox

Opened Jan 1, 2026 by bronx. Modified Jan 1, 2026

#163 JShelter and Brave QA Test

1

Opened May 16, 2025 by shepherd. Modified May 16, 2025

design decision question research

#162 Uninitialized Accelerometer reading causes null property access on first call

Opened May 14, 2025 by hyneksabacky. Modified May 14, 2025

#161 Consider changing protection level through notifications

Opened May 6, 2025 by polcak. Modified May 6, 2025

question research

#160 Allow user to disable notifications for a specific website

1

Opened May 6, 2025 by polcak. Modified May 6, 2025

enhancement

#159 captcha-delivery.com fails with JShelter

Opened May 6, 2025 by polcak. Modified May 6, 2025

broken page

#156 Consider changing Worker protection from Remove to Strict

1

Opened Apr 30, 2025 by polcak. Modified May 6, 2025

design decision project policy

#151 JShelter FPD Wrappers not applying correctly (custom version of JShelter 0.20)

5

Opened Mar 27, 2025 by noxx483. Modified May 6, 2025

#150 performance.now() is called in loop in debug mode (make debug) - only developers affected, probaly only in Chromium-based browsers

1

Opened Mar 17, 2025 by polcak. Modified May 6, 2025

bug

#149 Feature idea: once you've given a website permission to access your camera and microphone, jShelter should just disable itself.

Opened Mar 17, 2025 by polcak. Modified Mar 17, 2025

design decision research

#148 Cloudflare

14

Opened Mar 15, 2025 by harfho. Modified Sep 17, 2025

broken page research

#145 Low limit of possible Javascript Shield exceptions: Find a more space-efficient way to store the configuration

1

Opened Nov 5, 2024 by polcak. Modified Apr 22, 2025

bug design decision enhancement

#142 Blog post how to use caller names in fingerprint report missing

Opened Jul 2, 2024 by polcak. Modified Jul 2, 2024

good first issue website

#140 A user reported that it si possible to install JShelter to Kiwi (chromium-based) from AMO and the extension runtime is broken

1

Opened May 24, 2024 by polcak. Modified Sep 9, 2024

design decision

#139 Fill out "Adding new pages" section in README

3

Opened May 14, 2024 by rlafuente. Modified May 28, 2024

website

#137 Add hook to automate Weblate syncing for website

1

Opened May 14, 2024 by rlafuente. Modified Jul 8, 2024

website

#123 WebWorker API is not counted as used by the page

Opened Oct 16, 2023 by polcak. Modified Oct 16, 2023

bug design decision

#121 Blog series on the website

3

Opened Oct 2, 2023 by polcak. Modified Apr 22, 2024

website

#120 [feature] ip block

5

Opened Sep 18, 2023 by brettowe. Modified Mar 22, 2026

enhancement good first issue

#118 Move TOC on some pages away from the text flow

1

Opened Sep 14, 2023 by polcak. Modified Sep 14, 2023

enhancement good first issue website

#112 Consider implementing NEL Shield

1

Opened May 16, 2023 by polcak. Modified May 16, 2023

design decision enhancement

#109 FPD detects fingerprinting on WebGL conformance test suit

Opened Apr 12, 2023 by polcak. Modified Apr 12, 2023

enhancement

#106 The web page should point users to Chrome Store in Edge

Opened Apr 6, 2023 by polcak. Modified Apr 6, 2023

website

#105 www.jshelter.org should redirect to jshelter.org

Opened Apr 6, 2023 by polcak. Modified Apr 6, 2023

website

#97 Improve popup

1

Opened Mar 22, 2023 by polcak. Modified Apr 9, 2026

design decision enhancement

#93 Suggestions for the Firefox About this extension page from UX review

Opened Mar 22, 2023 by polcak. Modified Mar 22, 2023

documentation needed

#92 Consider other options to report bug and the options to promote these ways

3

Opened Mar 22, 2023 by polcak. Modified Apr 18, 2023

project policy website

#91 Presentation and documentation issues from JShelter UX review - native speakers needed

1

Opened Mar 22, 2023 by polcak. Modified Aug 31, 2023

documentation needed enhancement good first issue

#88 Think about reimplementation of `CanvasRenderingContext2D.isPointInStroke` and `CanvasRenderingContext2D.isPointInPath`

Opened Jan 27, 2023 by polcak. Modified Mar 27, 2023

enhancement

#81 Network Boundary Shield description on the web does not warn Chromium-based users about implementation flaws: merge all NBS files to generate the description

2

Opened Jul 28, 2022 by polcak. Modified Oct 21, 2022

website

#80 Worker wrappers need a complete rewrite

13

Opened Jul 20, 2022 by polcak. Modified Apr 30, 2025

bug research

#79 Consider providing more data about FPD actions to experienced users

Opened Jun 13, 2022 by polcak. Modified Mar 27, 2023

design decision

#74 Consider protection from leaky forms

Opened May 13, 2022 by polcak. Modified May 13, 2022

enhancement

#73 Make website directory Reuse compliant

Opened May 12, 2022 by polcak. Modified May 12, 2022

website

#71 Add unit test for the TLD+1 module, Replace our implementations with functions like normlize

Opened May 10, 2022 by polcak. Modified Aug 25, 2023

enhancement tests

#70 We need to document wrapper injection code

1

Opened May 10, 2022 by polcak. Modified May 26, 2022

documentation needed

#69 Can we replace random WebGL values with real-world strings?

4

Opened May 4, 2022 by polcak. Modified Apr 5, 2024

enhancement

#68 Consider adding options to make farbling less stable

3

Opened May 4, 2022 by polcak. Modified May 18, 2023

enhancement

#66 We need a mechanism to filter or modify events

Opened May 4, 2022 by polcak. Modified May 4, 2022

enhancement NLNet evaluation

#65 Modified value in Function.length property of wrapped functions

Opened May 4, 2022 by polcak. Modified May 4, 2022

bug

#64 Consider the future of the XHR wrapper

Opened May 4, 2022 by polcak. Modified May 4, 2022

enhancement NLNet evaluation

#63 Per page or temporary configuration of the extension

1

Opened May 4, 2022 by polcak. Modified May 6, 2025

enhancement

#61 Consider wrapping screen and window properties

Opened Apr 29, 2022 by polcak. Modified Apr 29, 2022

enhancement NLNet evaluation

#60 Consider adding wrappers for APIs that measure texts

Opened Apr 29, 2022 by polcak. Modified Jun 1, 2023

enhancement NLNet evaluation

#59 Add wrappers for ECMAScript Internationalization API and related API

Opened Apr 29, 2022 by polcak. Modified Apr 29, 2022

enhancement NLNet evaluation

#57 The injection of Connected cameras and microphones wrappers in Recommended level generates Uncaught (in promise) Error: Permission denied to access object in Firefox on testing page

2

Opened Apr 27, 2022 by polcak. Modified Apr 19, 2023

bug

#56 JShelter cannot be disabled on https://archive.org/donate in Edge and Brave

Opened Apr 22, 2022 by polcak. Modified May 6, 2025

broken page bug

#55 Many reports of Permission denied to access object on https://www.theguardian.com/world/2021/dec/01/eu-must-consider-mandatory-covid-jabs-says-von-der-leyen

1

Opened Apr 22, 2022 by polcak. Modified Apr 27, 2022

bug NLNet evaluation

#54 Consider adding doxygen-generated documentation to the developer notes section of the website

5

Opened Apr 20, 2022 by polcak. Modified Jul 10, 2024

website

#48 Inconsistencies when FPD logs calls from an iframe element

Opened Apr 11, 2022 by xsalon00. Modified Apr 11, 2022

bug

#44 Passive fingerprint detection

1

Opened Apr 8, 2022 by polcak. Modified Apr 20, 2022

design decision

#43 NSCL support for patching web workers

3

Opened Apr 8, 2022 by polcak. Modified Apr 12, 2023

enhancement

#35 Automatically reload page when a user changes configuration in the popup

Opened Mar 11, 2022 by polcak. Modified Mar 11, 2022

enhancement

#34 Detect RFP and modify behaviour

Opened Mar 11, 2022 by polcak. Modified Mar 11, 2022

enhancement

#33 Firefox APIs are not compatible with Proxy objects

5

Opened Mar 11, 2022 by polcak. Modified Sep 29, 2023

enhancement

#30 Level configuration in nested iframes

Opened Mar 9, 2022 by polcak. Modified Mar 9, 2022

bug enhancement

#28 Level backend redesign

Opened Mar 3, 2022 by polcak. Modified Mar 3, 2022

enhancement

#25 Consider an option to generate white noise images in canvas

Opened Mar 3, 2022 by polcak. Modified Apr 17, 2022

enhancement new wrapper research NLNet evaluation

#24 Popup is broken when `dom.storage.enabled == false`, making popup unusable

5

Opened Mar 2, 2022 by swissknife. Modified Mar 2, 2022

question

#22 TypeError: 'getCurrentPosition' called on an object that does not implement interface Geolocation.

2

Opened Feb 25, 2022 by polcak. Modified Apr 12, 2023

broken page bug

#20 Explore possibilities to enable community to create exceptions

3

Opened Feb 25, 2022 by polcak. Modified Apr 12, 2023

enhancement

#15 Doxygen commands not generated correctly by website

6

Opened Feb 18, 2022 by polcak. Modified Jul 10, 2024

bug website

#6 Allow manual input during "Specific domain level configuration"

1

Opened Jan 24, 2022 by polcak. Modified Jan 24, 2022

#3 Naming convention on wrappers

1

Opened Jan 24, 2022 by polcak. Modified Jun 4, 2022

#169 Fingerprint Detector (FPD) feature no longer works in Chrome.

1

Opened Jan 29, 2026 by red546. Modified Jan 30, 2026

#166 Handle userScripts API permissions change

4

Opened Jun 7, 2025 by gioma1. Modified Apr 9, 2026

#165 The problem I have with webpages is this: The page opens in text format. frontend breaks.

2

Opened May 29, 2025 by universish. Modified Jun 13, 2025

#164 I have activated the "Collect Error" feature. It contains personal data. How do I report these errors privately? Where should I report it?

1

Opened May 24, 2025 by universish. Modified Jun 13, 2025

#158 It won't play Dailymotion videos. "Your browser is not compatible. You may need to update your browser" error.

1

Opened May 5, 2025 by universish. Modified May 5, 2025

#157 Confusing report, in the end the reporter says that the problem is solved

6

Opened May 1, 2025 by universish. Modified May 5, 2025

question

#155 https://github.com/TecharoHQ/anubis breaks with JShelter

2

Opened Apr 30, 2025 by polcak. Modified Apr 30, 2025

#154 Limitation in the number of possible Javascript Shield exceptions

1

Opened Apr 17, 2025 by odenoma70. Modified Apr 22, 2025

#153 Cannot see destination or flight details on kiwi.com with removed WebWorkers

1

Opened Apr 9, 2025 by polcak. Modified Apr 9, 2025

#152 Cannot edit text on pad.riseup.net without WebWorkers in Firefox

1

Opened Apr 9, 2025 by polcak. Modified Apr 9, 2025

#147 [Feature request]Block automatic pop-up window

2

Opened Feb 17, 2025 by violets. Modified Mar 17, 2025

#146 Wrappers sometimes not timely applied on first page load after service worker / event script sleep & rewake (on page reload the they appear to work)

17

Opened Jan 9, 2025 by armload. Modified Mar 4, 2025

bug

#144 Suspected Heavy CPU load after re-login

1

Opened Jul 15, 2024 by shabby-shelter. Modified Sep 13, 2024

#143 Broken link in FAQs

2

Opened Jul 2, 2024 by aiscarvalho. Modified Jul 3, 2024

website

#141 Declaring a global function "updateCount" has severe side effects.

7

Opened Jun 27, 2024 by arionymousse. Modified Jun 28, 2024

#138 Fill out "Adding new pages" section in README

1

Opened May 14, 2024 by rlafuente. Modified May 24, 2024

#134 Render \see sections correctly

2

Opened Mar 25, 2024 by rlafuente. Modified Apr 2, 2024

website

#133 Very loud white noise

4

Opened Mar 4, 2024 by lint838. Modified Apr 9, 2026

bug

#131 MacOS intel can't build project

7

Opened Feb 26, 2024 by tomeryav. Modified Feb 28, 2024

#130 Completely blocking Web Worker by default should be reconsidered

1

Opened Feb 23, 2024 by zeroaurora. Modified Feb 28, 2024

#129 Website translation pipeline: last fixes

2

Opened Jan 23, 2024 by rlafuente. Modified Jul 9, 2024

website

#128 Disabled buttons look identical to enabled ones.

1

Opened Jan 7, 2024 by gioma1. Modified Jan 7, 2024

bug

#127 Switch to stateless background scripts (event page) on Firefox only (Android compat)

16

Opened Jan 7, 2024 by gioma1. Modified Apr 22, 2024

enhancement

#126 Translation license

1

Opened Nov 28, 2023 by comradekingu. Modified Nov 28, 2023

#124 Footer of blog post series not populated on jshelter.org

2

Opened Nov 1, 2023 by polcak. Modified Nov 28, 2023

website

#122 Missing WebWorker makes Google spreadsheets unusable

2

Opened Oct 16, 2023 by polcak. Modified Nov 2, 2023

broken page

#119 Could not load background script 'nscl/lib/sha256.js'.

3

Opened Sep 15, 2023 by thomzane. Modified Sep 18, 2023

#117 JShelter for Firefox Android

5

Opened Sep 13, 2023 by mark22k. Modified Sep 14, 2023

documentation needed good first issue website

#116 "Persistent identifier of the browser tab" protection when set to "Strict" makes reCAPTCHA load infinitely

3

Opened Jul 17, 2023 by gersonzao. Modified Sep 23, 2023

#115 Proton Mail breaks when ArrayBuffer protection is set to "Shift" or "Randomize" on Firefox

1

Opened Jul 8, 2023 by gersonzao. Modified Sep 29, 2023

#113 Add option to hash domain for fingerprint spoofing [Feature Request]

3

Opened May 18, 2023 by glisteningglamgowder. Modified May 18, 2023

#111 FPD makes some pages unusable (including the browser itself)

2

Opened Apr 20, 2023 by polcak. Modified Sep 26, 2023

broken page performance issue

#110 A switch to Manifest v3

2

Opened Apr 14, 2023 by polcak. Modified Sep 9, 2024

research

#108 Allow more ways to reset farbling state

2

Opened Apr 12, 2023 by polcak. Modified Apr 13, 2023

enhancement

#107 Fingerprint Protection causes performance warnings, hangs, incorrect WebGL test values when running the WebGL Conformance test suite

1

Opened Apr 8, 2023 by wolfgang8741. Modified Apr 12, 2023

#103 custom setting always reset to recommend setting every time exit browser

1

Opened Mar 27, 2023 by notusername. Modified Mar 28, 2023

#102 JShelter dont save my custom settings.

5

Opened Mar 25, 2023 by newone. Modified Mar 28, 2023

cannot reproduce question

#101 Add a table of contents with jump links to the FAQ.

1

Opened Mar 22, 2023 by polcak. Modified Sep 14, 2023

enhancement website

#100 Explain little lies in FAQ

1

Opened Mar 22, 2023 by polcak. Modified Apr 13, 2023

enhancement website

#99 Internal links in FAQ

2

Opened Mar 22, 2023 by polcak. Modified Sep 14, 2023

website

#98 On/off switches are ambiguous

1

Opened Mar 22, 2023 by polcak. Modified Apr 9, 2026

design decision enhancement

#96 Improve the subpage of adding a new level

2

Opened Mar 22, 2023 by polcak. Modified Oct 31, 2025

design decision enhancement

#95 Expand description of the wrappers applied when the user interacts with the tweak GUI

1

Opened Mar 22, 2023 by polcak. Modified Aug 25, 2023

enhancement good first issue

#94 Improve design of JShelter options

1

Opened Mar 22, 2023 by polcak. Modified Apr 9, 2026

enhancement good first issue

#90 JShelter not blocks canvas on Chrome Canary Latest version.

3

Opened Feb 22, 2023 by noche. Modified Feb 22, 2023

#89 FR: Show "Detail tweaks of JS shield for this site" for custom levels

3

Opened Feb 19, 2023 by gersonzao. Modified Mar 29, 2023

bug

#87 Website e-mfc.ru 100% CPU in FF

2

Opened Dec 14, 2022 by uxerre. Modified Aug 25, 2023

broken page cannot reproduce performance issue

#86 Odysee videos won't play when JavaScript Shield is enabled

7

Opened Nov 24, 2022 by gersonzao. Modified Feb 21, 2023

#85 Network Boundary Shield leaks DNS Server when using different Proxys and Firefox container

11

Opened Nov 20, 2022 by m-u-m-p-i-t-z. Modified Mar 29, 2023

bug design decision question

#83 FPD breaks Gitlab browser check even when it is passive

4

Opened Sep 1, 2022 by wiggum. Modified May 6, 2025

broken page research

#82 Add git submodule contents to Release artifacts

4

Opened Aug 20, 2022 by fufexan. Modified Mar 22, 2023

#77 Broken links on the Key protection pages

2

Opened Jun 13, 2022 by polcak. Modified Jun 13, 2022

website

#72 Inconsistent navigation on subpages

2

Opened May 10, 2022 by xsalon00. Modified May 13, 2022

cannot reproduce website

#62 security.txt

1

Opened Apr 29, 2022 by polcak. Modified Oct 13, 2022

website

#58 Improve window.name wrapper

5

Opened Apr 28, 2022 by polcak. Modified May 13, 2022

broken page enhancement

#53 Links to test description broken at https://jshelter.org/new-wrapper/

1

Opened Apr 20, 2022 by polcak. Modified Oct 13, 2022

bug website

#52 Show caller name in fingerprint report

1

Opened Apr 19, 2022 by polcak. Modified Sep 27, 2023

enhancement

#51 NSCL initiates request to [ff00::] that are not documented and it is unclear why ff00::

14

Opened Apr 15, 2022 by sampei-nihira. Modified May 4, 2022

documentation needed NLNet evaluation

#50 Some PeerTube instances breaks with JavaScript Shield switched on

3

Opened Apr 14, 2022 by jokingon. Modified Apr 14, 2022

#49 Accelerometer duplicit on the web page

1

Opened Apr 13, 2022 by polcak. Modified Oct 13, 2022

website

#46 window.name wrapper and WrapHelper.domainChanged

7

Opened Apr 8, 2022 by polcak. Modified May 10, 2022

enhancement

#42 WebWorker 'Strict' protection makes video playback unstable, sometimes broken

2

Opened Apr 7, 2022 by redeclipse. Modified Apr 12, 2023

#41 Network Boundary Shield and NoScript

8

Opened Apr 5, 2022 by polcak. Modified Mar 29, 2023

design decision documentation needed

#39 Improve UX and layout

10

Opened Mar 26, 2022 by nirvinm. Modified Apr 28, 2022

#38 Apply CSP for webextension pages

1

Opened Mar 23, 2022 by polcak. Modified Apr 28, 2022

good first issue NLNet evaluation

#37 Web page explaining how to configure

2

Opened Mar 17, 2022 by polcak. Modified Oct 13, 2022

website

#36 Key protections on web page

2

Opened Mar 17, 2022 by polcak. Modified Oct 13, 2022

website

#27 htmlcanvaselement and webgl wrapping groups are confusing

1

Opened Mar 3, 2022 by polcak. Modified Mar 16, 2022

enhancement

#26 Automatic web deployment

6

Opened Mar 3, 2022 by polcak. Modified Oct 24, 2022

website

#23 Farbling needs a thorough security review

3

Opened Mar 1, 2022 by polcak. Modified May 6, 2022

bug NLNet evaluation

#21 NBS improvements regarding blocking requests to 127.0.0.1

1

Opened Feb 25, 2022 by polcak. Modified May 4, 2022

enhancement NLNet evaluation

#19 FPD and maphub.net

2

Opened Feb 25, 2022 by polcak. Modified Sep 29, 2023

broken page

#18 Optional permissions for AFPD

2

Opened Feb 25, 2022 by polcak. Modified Mar 18, 2022

enhancement

#17 JShelter slows down WebGL animation on Github homepage

4

Opened Feb 22, 2022 by xsalon00. Modified Sep 29, 2023

performance issue

#16 The performance cost of wrappers may make page unresponsible and popup not being filled (for example ebay.com)

6

Opened Feb 22, 2022 by xsalon00. Modified Apr 28, 2022

broken page performance issue NLNet evaluation

#14 fpDb organization, possible room for performance improvemens

2

Opened Feb 18, 2022 by polcak. Modified Mar 16, 2022

performance issue

#13 document.browsingTopics() should return zero Topic IDs or farabled topics

1

Opened Jan 29, 2022 by polcak. Modified Mar 22, 2026

new wrapper

#12 Block Google FLoC/Topics on webiste

6

Opened Jan 29, 2022 by polcak. Modified Sep 8, 2023

website

#11 Rebranding

2

Opened Jan 25, 2022 by polcak. Modified Apr 17, 2022

0.7.x

#10 [icon] Level numbers and color have different meaning than other extensions

3

Opened Jan 24, 2022 by polcak. Modified Feb 18, 2022

0.7.x

#9 roundcube webmail and JShield

2

Opened Jan 24, 2022 by polcak. Modified Apr 28, 2022

broken page cannot reproduce NLNet evaluation

#8 [website] Link language is hardcoded in links

Opened Jan 24, 2022 by polcak. Modified Jan 24, 2022

#7 Extension icon pop-up window geometry broken

Opened Jan 24, 2022 by polcak. Modified Jan 24, 2022

#5 Google reCaptcha not compatible with JSR

2

Opened Jan 24, 2022 by polcak. Modified Sep 6, 2022

broken page NLNet evaluation

#4 .then errors

Opened Jan 24, 2022 by polcak. Modified Jan 24, 2022

#2 Access to original toString

Opened Jan 24, 2022 by polcak. Modified Jan 24, 2022

#1 unit_test code needs clarifications

1

Opened Jan 24, 2022 by polcak. Modified Jan 24, 2022

JShelter / webextension

Issues
66 Open 87 Closed

JShelter / webextension

Issues 66 Open 87 Closed

Issues
66 Open 87 Closed