It looks like this is a web page, not a feed. I looked for a feed associated with this page, but couldn't find one. Please enter the address of your feed to validate.

Source: https://community.mozilla.org/en/people/bryanfrew/

  1. <!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'community.mozilla.org',cType: 'non-interactive',cRay: '9780ef59f95cd6b8',cH: '8yhwCyUe2g5TV3Sc16gFNJPbyswLPx_pme8oYTHPRL8-1756689519-1.2.1.1-nB6f4EmTPJTdJRFnknSebV7ogAIjaFOidwKzO1a8vUiWqY6HmEmvQF9b8YMfbPqn',cUPMDTk:"\/en\/people\/bryanfrew\/?__cf_chl_tk=uN3CVJbxSAqM_rFqC7Rb0kNPmr.uaEWZVH.VAs5oRiY-1756689519-1.0.1.1-TvQyD428cVz3Eq1.oBmRLtc9YH3vXiC0K3yhonceIxI",cFPWv: 'b',cITimeS: '1756689519',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/en\/people\/bryanfrew\/?__cf_chl_f_tk=uN3CVJbxSAqM_rFqC7Rb0kNPmr.uaEWZVH.VAs5oRiY-1756689519-1.0.1.1-TvQyD428cVz3Eq1.oBmRLtc9YH3vXiC0K3yhonceIxI",md: 'Y7DI9eKalkpGFm.aYVLpCSvzyzIqb9Op.O0ngKp7cdM-1756689519-1.2.1.1-4c7goQITzuH_IMz2NF8nXBQKiJ47maJJewo6dcL4uavKToxf9qB70Gf9.2lTPPeBjN7wQN.wA29F76cp0X9bmA..tXSOWBuAiE6qRW3i89SAoK.viBOC96t7eKw6MCzWrsWX5boAvS4pd0L99tB8PgQdXcAxloqccnRmG9hEoqCZkHefA.QPvNwa4SruYVpcrw_Cs29xAA2kh8q5sUklgpo8EDzvFHJFtGE70arbljc7NSu862ydx0wiehW.ftk.ReGmW90YWMVt0igjLeX78iZ3.ViJcJkowPlad3j6kD8p39irq._tH_f3fbdiM4dkbHkxYCV3lZ1qDjJILU8wAtUoXPIsj.ZZNKyA_QjhgA980ltbpRyEKSGVZFcEcXWc.9jE7yu375_c_B24hG.XcjOkVEOGHJB9kgNXcw6tcHyj.MXT9ngy7_RllnacWFUsBex3ZDlJHX021cypODhOVj9ApuLi2n5Uqbzwiob1Jj0_v49HpQSv_1LcbbOu2wZ55pd_Mjtzqrjitk8pwlAuF6YwC5X_W8AYEAvpYlugIH7BTLaRw2pcjWAdiEkIkYydfX3cyVisLt8XY15Yw4itNx4AQl1XLInp18250_gJnZVU4TsGl19JfbrH0fvOAGCyU2RV9qMeztg.XLnSAXesf3cSalZBatt4zg6yr32QebFu.lvPMQiUVPFqzsLQgS56lJ2dl5ExM8fr9k91RbRwGy8mmZHLQ8AfTOnwN4XrAa7IdxrkxsAhjYv5kv9tTbdiF5AWGG_uusOSvw7u795ciAMNRB6IblUQzzbVOsP7LzzSCuxdQ7nm2iJ_tD1vjJVya7PVs30HmqS6jfxBmQbPL3.jbthQO0NiQ8.uCUqHLyr_PgryFqzU17smHAhxslYIt.zyebmjQmMuep.iWg0Dfltc57ZydRTsuPoXnIFkjD1BObfdHpxhQCnkYmYLUF_PsgshwMFtyX5mn_o_jenPxTBDTx8fYWlqNrdjHClVkCzJA1k1yxnjwRzVTqFeUoYedxaiwQFc7MhaVjnTlmLn7w',mdrd: 'CtJiWdv2frrOs3mxHNV7Ty_.GjPlV8rmil0978V4eHw-1756689519-1.2.1.1-7.jnB_PcTVt6i7eYZ_6d2oCs2Zl1DdZOECtY2PuOJ1XaM8TgNldSqmuYIfBHQvlQd7DoquTaw_6PX0HJ80DuW.JwYMuiDRAP1MSDNh7lIm43NMsBDTgWI1fzHbZdXp8zCtaCBTpmaBGcAO734ol2kbdVhRx4pMCydBcjZTuIRmRp3iQG7aUI9RSYNRoH6iDed6F_owkGnY6cmbnBLEOOhMzpJvo1NtGR_WLey0Gw8CrmKzyipClSpL.bX7zMn_yB5Rub1.rO9gN03rNOz3f5wQT8lKrBKdIR_LOPoo.zN0W_okC3VZa4VoQPQM5LzvQMxCC4Uf6hkOvj0YwK9LXUBDg.V5IDPPErVhS_6ZNLKqxaykpN4k7mnMGvK0V2pWHV8ceHzDINo6JQPlv7b63fiOKD.LavMD7r_PldCk.8eyR7MR2NO2Svrd1TcAxFcdjfrry17XT_BVCH0FhjEztrJrP0kVmzPNWbsGa4XCOqFYg5On9RLxxxaNsjePKMWXmYis_fQZFWeJZKODeE0CTZg4VPgRDQ.t4FeXKgFvZb3zwtOirT0QlthXMV0KBZ.bAnsmOZDYTC4Wjg.fWhyKAjcRQ8X2_xy0Z8zZujAvdro_GxPMqG65E1VB2ctKCh7coPSltON.BG9WuhLvCYM.sST.Ggp7ogqV4s4I5xvCfnbyMmXBC2kqjmWJDYdMNGvMAY5Z_5DdrSfKA5QFKZvWM4jEUvdQ_8DWw2OixwDX4kD08d9varlz9qvTse58aa1pszZZX8FJOy6oF1Cp0cD2LSZlPbR7DoZT1iyBExbrqqd1h7_8h6EARuqz6r0fucjoGFCIrEbp0WnQWnXwKqVH3gKgx.G6D2ZlVIyaOl4Pgh6.ywBXvKowbBm7p_4fMVdmcR9C.Q.wPVWaahAZFZEHY0_YsH7z9sxLHxwaEs5_8T1G0zjjd4.NTXn.UzcQ6ymc1goQA4blIkZlsTwPgawSMA2CA1Dp8CNEVGfwADUyZmA_MjYc40FMx0KyvuXyuG54Mzh2YdcJQN9D5fMDWVguI5q.feyob5KAm7tYrxADszK52dtOUCDq6MCzgRr3x9d15_qkGD2VcVsHNmEhjD6T2uzhN2GVMnb_Ji9V98nGPT_IZ3SuRFHIdlSko5QFIBlwt.FdMK8Q4dx9frvH__Dsf1FDVHImMkH5_1N1pTNdRBxo8iO5xcj4ynwOF4EcVSs4CSJsA7n.cRLkI5Dy5GYqpKtIPpBtqk1KDzXV6dKx__eic7qMuzD8OIHsNOWQm2KbhQFHZui6kbTAgKSGEREAV8Gb_tHk_S9Bw1PDSs7_X2l11ihZBg7cFja5nZZieVZRzCUy_DdY1Da3D4atG2safLWf6XlDngmzEBZUwFWOP_OQA26OGcLM.kv0KjjEtbhpNmJ3KBgbb1gVl1PLyYcvIGGwVD.fHcw_Zkx3We188RVLe_QsfUA.mS5uLf1Iji6rb2f0mG6L_N_u036t95occ4vsa90fm0rjPpinZVMeOB.LdFuY8zCxqdcBuNb31Vj_157KE4dEmNJb_YFkG_HNhEhpPAxK_sOeX_7uJTfGgF648NQejlwbYjQz3WBvuC__F9EPV5t.3titloVxN4khvPbYJwvVsyelg7WPIj1cdP3XCu8MEvCj5trpsg8_ugQuAeskPm0O9RPH.rZ0iCPMDQbPgASGiJ7gqV3MXjHZZhrya8r3NIsOPIz7gHGLc2kmmqqbbdWqa17ip48YHCteABXnRxpAhYyNk2P0scBOQhA7rQl2iRpf5ylJ_0hNRgnevlZHanlwPim4h3cqDFZxVt.I2UwhIsxzMGT6GEqx_3z5SW1_qzGBlI9N9u56O5cVRjeISUEPwExle4G0cVGZF5iAi.vrfu.L4_NlFwXqHXBEArv5XXkSjW2O9RD4OaQlqG',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9780ef59f95cd6b8';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null,"\/en\/people\/bryanfrew\/?__cf_chl_rt_tk=uN3CVJbxSAqM_rFqC7Rb0kNPmr.uaEWZVH.VAs5oRiY-1756689519-1.0.1.1-TvQyD428cVz3Eq1.oBmRLtc9YH3vXiC0K3yhonceIxI"+ window._cf_chl_opt.cOgUHash);a.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(a);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda