{ "title": "Blacklight Inspection", "page_title": "Arie van Deursen | Software engineering in theory and practice", "uri_ins": "http://avandeursen.com/", "uri_dest": "https://avandeursen.com/", "uri_redirects": [ "http://avandeursen.com/" ], "secure_connection": {}, "host": "avandeursen.com", "config": { "emulateDevice": { "name": "Pixel 4a (5G)", "userAgent": "Mozilla/5.0 (Linux; Android 11; Pixel 4a (5G)) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4812.0 Mobile Safari/537.36", "viewport": { "width": 353, "height": 745, "deviceScaleFactor": 3, "isMobile": true, "hasTouch": true, "isLandscape": false } }, "cleareCache": true, "captureHar": true, "captureLinks": false, "enableAdBlock": false, "saveBrowserProfile": false, "numPages": 2, "defaultTimeout": 35000, "defaultWaitUntil": "networkidle2", "headless": true, "headers": {}, "extraChromiumArgs": [ "--disable-features=TrackingProtection3pcd", "--website-analysis-scan=a3d80b59-d625-449e-b2d7-ba7c8b468d74" ], "extraPuppeteerOptions": {} }, "browser": { "name": "Chromium", "version": "Chrome/127.0.6533.88", "user_agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/127.0.0.0 Safari/537.36", "platform": { "name": "Linux", "version": "4.4.302+" } }, "script": { "host": "959e5c2966f8", "version": { "npm": "3.11.0", "commit": "dev" }, "node_version": "v24.20.0" }, "start_time": "2026-09-07T22:08:12.458Z", "end_time": "2026-09-07T22:08:39.463Z", "browsing_history": [ "https://avandeursen.com/", "https://avandeursen.com/tag/acict/", "https://avandeursen.com/tag/software-architecture/" ], "hosts": { "requests": { "first_party": [ "avandeursen.com" ], "third_party": [ "fonts-api.wp.com", "imgs.xkcd.com", "stats.wp.com", "fonts.wp.com", "pixel.wp.com", "r-login.wordpress.com", "s0.wp.com", "avandeursen.files.wordpress.com", "i0.wp.com", "avandeursen.wordpress.com", "2.gravatar.com" ] } }, "reports": { "behaviour_event_listeners": { "MOUSE": { "https://avandeursen.com/wp-content/mu-plugins/actionbar/actionbar.js?v=20250204": [ "scroll", "click" ], "https://avandeursen.com/wp-content/js/bilmur.min.js?i=17&m=202618": [ "click" ], "https://avandeursen.com/wp-content/js/bilmur.min.js?i=17&m=202637": [ "click" ], "https://avandeursen.com/_static/??-eJyNkNFOwzAMRX8Ix2o3RF8Qn4LS1B1uHTuqk8H+fiCtgBAPe7xX5x5ZxvcCybSSVswNirQTq+NCtcS03jJmM8VX1oRjY5mQdWblSuBpM5E9X0JmDYs/4C/rrkw2iqXVsQ/dEDpwzkUINjqHI07sFZcfCMTiRNt/vvpGmRxLG/ETEaGvncYzn2Jluw/3lQsI6wqzpeYw88ff3f3PSHGz5iTf3F7crn/Jz93T8Nj3h0M3LFdOxIfx": [ "scroll" ], "https://avandeursen.com/wp-content/js/bilmur.min.js?i=17&m=202636": [ "click" ] }, "KEYBOARD": { "https://avandeursen.com/wp-content/js/bilmur.min.js?i=17&m=202618": [ "keydown" ], "https://avandeursen.com/wp-content/js/bilmur.min.js?i=17&m=202637": [ "keydown" ], "https://avandeursen.com/wp-content/js/bilmur.min.js?i=17&m=202636": [ "keydown" ] } }, "canvas_fingerprinters": { "data_url": {}, "fingerprinters": [], "styles": {}, "texts": {} }, "canvas_font_fingerprinters": { "canvas_font": {}, "text_measure": {} }, "cookies": [], "fb_pixel_events": [], "tiktok_pixel_events": [], "twitter_pixel_events": [], "google_analytics_events": [], "key_logging": {}, "session_recorders": {}, "third_party_trackers": [ { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "crypt": "UE40eW5QN0p8M2Y/RE1mNzc2NTVTamdsd0xoLz9RQkM2K298TXY9bERQMXc2MjhEaVZfb2wwakRoSj0mUkp1THptM1NdbkV1WjZIcU9mVWQmPUIvMlN6Jk8wW3NYVEJ3dWZOWExuWD9UcTNZP1dqNklMTyVQNF1lUkhyXUJ3OGJXaS1iRHB8U0FMRTd8dHIlMjgtL3hzVSthVUQyZjlaOTJQTEk1RWVHSEF5YmhaRDFwLHdRJmFyL1tmUnNoJjNtVjg2VXRHMnwmUWhRNHd8VSUveGtsb1ZNcEcrcmR0fnJQRGY/ZkNMTFhiM3o5U3FiMDJ5OFBdMn5yN3NbdG9PWVd0bGkrayZdY3lJdi4/PVBMcltBb28xYkktWHR1SE5bJjcsNGM2TiUwRiZ+bmcmZ3Y=", "rand": 0.504314639955141, "v": "wpcom-no-pv" } }, "stack": [ { "fileName": "https://avandeursen.com/tag/software-architecture/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?crypt=UE40eW5QN0p8M2Y%2FRE1mNzc2NTVTamdsd0xoLz9RQkM2K298TXY9bERQMXc2MjhEaVZfb2wwakRoSj0mUkp1THptM1NdbkV1WjZIcU9mVWQmPUIvMlN6Jk8wW3NYVEJ3dWZOWExuWD9UcTNZP1dqNklMTyVQNF1lUkhyXUJ3OGJXaS1iRHB8U0FMRTd8dHIlMjgtL3hzVSthVUQyZjlaOTJQTEk1RWVHSEF5YmhaRDFwLHdRJmFyL1tmUnNoJjNtVjg2VXRHMnwmUWhRNHd8VSUveGtsb1ZNcEcrcmR0fnJQRGY%2FZkNMTFhiM3o5U3FiMDJ5OFBdMn5yN3NbdG9PWVd0bGkrayZdY3lJdi4%2FPVBMcltBb28xYkktWHR1SE5bJjcsNGM2TiUwRiZ%2BbmcmZ3Y%3D&v=wpcom-no-pv&rand=0.504314639955141" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "arch_results": 9, "arch_tag": "software-architecture", "blog": 37539060, "host": "avandeursen.com", "rand": 0.575002031237523, "ref": "", "subd": "avandeursen", "tz": 2, "user_id": 0, "v": "wpcom" } }, "stack": [ { "fileName": "https://avandeursen.com/tag/software-architecture/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?blog=37539060&v=wpcom&tz=2&user_id=0&arch_tag=software-architecture&arch_results=9&subd=avandeursen&host=avandeursen.com&ref=&rand=0.575002031237523" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "rand": 0.7535640720554178, "v": "wpcom-no-pv", "x_stats-initial-visibility": "visible" } }, "stack": [ { "fileName": "https://avandeursen.com/tag/software-architecture/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?x_stats-initial-visibility=visible&v=wpcom-no-pv&rand=0.7535640720554178" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "batcache_hit": 0, "bilmur": 1, "cls": 0, "custom_props": { "logged_in": "0", "wptheme": "pub/adelle", "wptheme_is_block": "0" }, "downlink": 10000, "edge_dc": "cdg", "edge_dur": 279, "edge_status": "MISS", "fcp": 731, "fcp_raw": 731, "fp_raw": 731, "full_path": "/tag/acict/", "inp": 1160, "lcp": 1042, "lcp_raw": 1042, "lcp_sel": "#post-1514>div.entry-content>p.wp-block-paragraph", "lcp_type": "text", "nav_type": "navigate", "nt": "2--____2_2_2_2_2_1_5_83_8n_a3_nc_t8_th_16c_16c_16d--0_0_0_--h2", "provider": "wordpress.com", "reporter": "fetchLater", "rtt": 0, "service": "simple", "site_host": "avandeursen.com", "site_path": "/tag/acict/", "site_tz": "Europe/Amsterdam", "ttfb": 291, "version": "4.5.0" } }, "stack": [ { "fileName": "https://avandeursen.com/tag/software-architecture/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/boom.gif?bilmur=1&batcache_hit=0&provider=wordpress.com&service=simple&site_tz=Europe%2FAmsterdam&custom_props=%7B%22logged_in%22%3A%220%22%2C%22wptheme%22%3A%22pub%2Fadelle%22%2C%22wptheme_is_block%22%3A%220%22%7D&rtt=0&downlink=10000&site_host=avandeursen.com&site_path=%2Ftag%2Facict%2F&full_path=%2Ftag%2Facict%2F&version=4.5.0&edge_dc=cdg&edge_status=MISS&edge_dur=279&nt=2--____2_2_2_2_2_1_5_83_8n_a3_nc_t8_th_16c_16c_16d--0_0_0_--h2&reporter=fetchLater&fcp=731&fcp_raw=731&fp_raw=731&lcp=1042&lcp_raw=1042&lcp_sel=%23post-1514%3Ediv.entry-content%3Ep.wp-block-paragraph&lcp_type=text&cls=0&ttfb=291&nav_type=navigate&inp=1160" }, { "data": { "body": {}, "filter": "||stats.wp.com^", "listName": "easyprivacy.txt", "query": { "68": "" } }, "stack": [ { "fileName": "https://avandeursen.com/tag/software-architecture/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://stats.wp.com/w.js?68" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "crypt": "UE40eW5QN0p8M2Y/RE1mNzc2NTVTamdsd0xoLz9RQkM2K298TXY9bERQMXc2MjhEaVZfb2wwakRoSj0mUkp1THptM1NdbkV1WjZIcU9mVWQmPUIvMlN6Jk8wW3NYVEJ3dWZOWExuWD9UcTNZP1dqNklMTyVQNF1lUkhyXUJ3OGJXaS1iRHB8U0FMRTd8dHIlMjgtL3hzVSthVUQyZjlaOXN1XVJuT1BJdGtfVSVtQkd0cjZWWDU4QkEyJkJmZHhRTSwzZE9iND9fWj0teD1SP0FpMjN5Wm9dZWR2ZnFwd0FjaTZYcj8wW1VOfktUaVJYaCVfNFdafiU2LVpmY0JXSjVwcVFtZk5aSE5HVGFxJXBrZkFmc1Z8VWwvUkZhT3xmWHMwMHVyPzB3SUEucnR4Mno=", "rand": 0.5879019826041365, "v": "wpcom-no-pv" } }, "stack": [ { "fileName": "https://avandeursen.com/tag/acict/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?crypt=UE40eW5QN0p8M2Y%2FRE1mNzc2NTVTamdsd0xoLz9RQkM2K298TXY9bERQMXc2MjhEaVZfb2wwakRoSj0mUkp1THptM1NdbkV1WjZIcU9mVWQmPUIvMlN6Jk8wW3NYVEJ3dWZOWExuWD9UcTNZP1dqNklMTyVQNF1lUkhyXUJ3OGJXaS1iRHB8U0FMRTd8dHIlMjgtL3hzVSthVUQyZjlaOXN1XVJuT1BJdGtfVSVtQkd0cjZWWDU4QkEyJkJmZHhRTSwzZE9iND9fWj0teD1SP0FpMjN5Wm9dZWR2ZnFwd0FjaTZYcj8wW1VOfktUaVJYaCVfNFdafiU2LVpmY0JXSjVwcVFtZk5aSE5HVGFxJXBrZkFmc1Z8VWwvUkZhT3xmWHMwMHVyPzB3SUEucnR4Mno%3D&v=wpcom-no-pv&rand=0.5879019826041365" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "arch_results": 2, "arch_tag": "acict", "blog": 37539060, "host": "avandeursen.com", "rand": 0.1427356206810031, "ref": "", "subd": "avandeursen", "tz": 2, "user_id": 0, "v": "wpcom" } }, "stack": [ { "fileName": "https://avandeursen.com/tag/acict/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?blog=37539060&v=wpcom&tz=2&user_id=0&arch_tag=acict&arch_results=2&subd=avandeursen&host=avandeursen.com&ref=&rand=0.1427356206810031" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "rand": 0.9543211069158124, "v": "wpcom-no-pv", "x_stats-initial-visibility": "visible" } }, "stack": [ { "fileName": "https://avandeursen.com/tag/acict/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?x_stats-initial-visibility=visible&v=wpcom-no-pv&rand=0.9543211069158124" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "batcache_hit": 0, "bilmur": 1, "cls": 2.367, "custom_props": { "logged_in": "0", "wptheme": "pub/adelle", "wptheme_is_block": "0" }, "downlink": 10000, "edge_dc": "cdg", "edge_dur": 3, "edge_status": "STALE", "fcp": 486, "fcp_raw": 486, "fp_raw": 486, "full_path": "/", "inp": 160, "lcp": 486, "lcp_pre": 0, "lcp_raw": 486, "lcp_res": "https://avandeursen.com/wp-content/uploads/2025/12/bxnord-1.jpg", "lcp_sel": "div.entry-content>div.wp-block-image>figure.alignright.is-resized.size-large>a>img.wp-image-1632", "lcp_type": "img", "nav_type": "navigate", "nt": "2--____8_n_n_n_1a_u_1a_1k_1z_1x_im_n0_np_yn_yn_yn--0_0_0_--h2", "provider": "wordpress.com", "reporter": "fetchLater", "rtt": 0, "service": "simple", "site_host": "avandeursen.com", "site_path": "/", "site_tz": "Europe/Amsterdam", "ttfb": 56, "version": "4.5.0" } }, "stack": [ { "fileName": "https://avandeursen.com/tag/acict/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/boom.gif?bilmur=1&batcache_hit=0&provider=wordpress.com&service=simple&site_tz=Europe%2FAmsterdam&custom_props=%7B%22logged_in%22%3A%220%22%2C%22wptheme%22%3A%22pub%2Fadelle%22%2C%22wptheme_is_block%22%3A%220%22%7D&rtt=0&downlink=10000&site_host=avandeursen.com&site_path=%2F&full_path=%2F&version=4.5.0&edge_dc=cdg&edge_status=STALE&edge_dur=3&nt=2--____8_n_n_n_1a_u_1a_1k_1z_1x_im_n0_np_yn_yn_yn--0_0_0_--h2&reporter=fetchLater&fcp=486&fcp_raw=486&fp_raw=486&lcp=486&lcp_raw=486&lcp_sel=div.entry-content%3Ediv.wp-block-image%3Efigure.alignright.is-resized.size-large%3Ea%3Eimg.wp-image-1632&lcp_type=img&lcp_res=https%3A%2F%2Favandeursen.com%2Fwp-content%2Fuploads%2F2025%2F12%2Fbxnord-1.jpg&lcp_pre=0&cls=2.367&ttfb=56&nav_type=navigate&inp=160" }, { "data": { "body": {}, "filter": "||stats.wp.com^", "listName": "easyprivacy.txt", "query": { "69": "" } }, "stack": [ { "fileName": "https://avandeursen.com/tag/acict/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://stats.wp.com/w.js?69" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "arch_home": 1, "baba": 0.15735120327036722, "blog": 37539060, "post": 0, "subd": "avandeursen", "tz": 2, "user_id": 0, "v": "wpcom", "x_pagetype": "infinite" } }, "stack": [ { "fileName": "https://avandeursen.com/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?blog=37539060&v=wpcom&tz=2&user_id=0&arch_home=1&subd=avandeursen&x_pagetype=infinite&post=0&baba=0.15735120327036722" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "arch_home": 1, "baba": 0.22248361583480158, "blog": 37539060, "post": 0, "subd": "avandeursen", "tz": 2, "user_id": 0, "v": "wpcom", "x_pagetype": "infinite" } }, "stack": [ { "fileName": "https://avandeursen.com/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?blog=37539060&v=wpcom&tz=2&user_id=0&arch_home=1&subd=avandeursen&x_pagetype=infinite&post=0&baba=0.22248361583480158" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "arch_home": 1, "baba": 0.5028219540476973, "blog": 37539060, "post": 0, "subd": "avandeursen", "tz": 2, "user_id": 0, "v": "wpcom", "x_pagetype": "infinite" } }, "stack": [ { "fileName": "https://avandeursen.com/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?blog=37539060&v=wpcom&tz=2&user_id=0&arch_home=1&subd=avandeursen&x_pagetype=infinite&post=0&baba=0.5028219540476973" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "arch_home": 1, "baba": 0.43249760192044073, "blog": 37539060, "post": 0, "subd": "avandeursen", "tz": 2, "user_id": 0, "v": "wpcom", "x_pagetype": "infinite" } }, "stack": [ { "fileName": "https://avandeursen.com/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?blog=37539060&v=wpcom&tz=2&user_id=0&arch_home=1&subd=avandeursen&x_pagetype=infinite&post=0&baba=0.43249760192044073" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "crypt": "UE40eW5QN0p8M2Y/RE1mNzc2NTVTamdsd0xoLz9RQkM2K298TXY9bERQMXc2MjhEaVZfb2wwakRoSj0mUkp1THptM1NdbkV1WjZIcU9mVWQmPUIvMlN6Jk8wW3NYVEJ3dWZOWExuWD9UcTNZP1dqNklMTyVQNF1lUkhyXUJ3OGJXaS1iRHB8U0FMRTd8dHIlMjgtL3hzVSthVUQyZjlaZ0wzNC82d1glJWRLcHlXU3hGRT1fQVBJUT9oP1Q9dDRFcnlYTFpwXV1fUjRQX3h8U2NuQVFEUEZ5VmRSSFIwPTMvMURZbHl4cEtLd0htNUFQbD1QVGVFciZRVlktTDk1NjZxWWJPa2ZGVV9BSVtaWj81K0NNPWFqfkxSYWNaZUYxWUdGRHJ+ZjRacUhxV1My", "rand": 0.1205046718535634, "v": "wpcom-no-pv" } }, "stack": [ { "fileName": "https://avandeursen.com/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?crypt=UE40eW5QN0p8M2Y%2FRE1mNzc2NTVTamdsd0xoLz9RQkM2K298TXY9bERQMXc2MjhEaVZfb2wwakRoSj0mUkp1THptM1NdbkV1WjZIcU9mVWQmPUIvMlN6Jk8wW3NYVEJ3dWZOWExuWD9UcTNZP1dqNklMTyVQNF1lUkhyXUJ3OGJXaS1iRHB8U0FMRTd8dHIlMjgtL3hzVSthVUQyZjlaZ0wzNC82d1glJWRLcHlXU3hGRT1fQVBJUT9oP1Q9dDRFcnlYTFpwXV1fUjRQX3h8U2NuQVFEUEZ5VmRSSFIwPTMvMURZbHl4cEtLd0htNUFQbD1QVGVFciZRVlktTDk1NjZxWWJPa2ZGVV9BSVtaWj81K0NNPWFqfkxSYWNaZUYxWUdGRHJ%2BZjRacUhxV1My&v=wpcom-no-pv&rand=0.1205046718535634" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "arch_home": 1, "blog": 37539060, "host": "avandeursen.com", "rand": 0.92760186016143, "ref": "", "subd": "avandeursen", "tz": 2, "user_id": 0, "v": "wpcom" } }, "stack": [ { "fileName": "https://avandeursen.com/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?blog=37539060&v=wpcom&tz=2&user_id=0&arch_home=1&subd=avandeursen&host=avandeursen.com&ref=&rand=0.92760186016143" }, { "data": { "body": {}, "filter": "||pixel.wp.com^", "listName": "easyprivacy.txt", "query": { "rand": 0.5312219154130318, "v": "wpcom-no-pv", "x_stats-initial-visibility": "visible" } }, "stack": [ { "fileName": "https://avandeursen.com/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://pixel.wp.com/g.gif?x_stats-initial-visibility=visible&v=wpcom-no-pv&rand=0.5312219154130318" }, { "data": { "body": {}, "filter": "||stats.wp.com^", "listName": "easyprivacy.txt", "query": { "69": "" } }, "stack": [ { "fileName": "https://avandeursen.com/", "source": "ThirdPartyTracker RequestHandler" } ], "type": "TrackingRequest", "url": "https://stats.wp.com/w.js?69" } ] } }