Pretty much every PSP Firmware that has ever been released.

PSP Official Firmwares
VersionMD5 HashFilesizeMEGAArchive.org
Firmware 6.616be8878f475ac5b1a499b95ab2f7d30131.1MBDownloadDownload
Firmware 6.602ca64d59dcf48f45fb99b400a586b39531.1MBDownloadDownload
Firmware 6.50 (ZIP)48fdf936a5912963278d6e8049111ca518.0MBDownloadDownload
Firmware 6.39ccce1a0f3ba08e22c26ec5bc047a006330.2MBDownloadDownload
Firmware 6.38d033298a1de455a5d90e06f91c6802f630.2MBDownloadDownload
Firmware 6.375a21c511c90ed765747c43a9779f7a4b30.2MBDownloadDownload
Firmware 6.36bcac2b0a4ac55378f300386391e4bb3730.2MBDownloadDownload
Firmware 6.355945c21abfa5b1221adda745f941766830.2MBDownloadDownload
Firmware 6.31d7ea54162d2d53c5efb46648ee12f6bc30.2MBDownloadDownload
Firmware 6.3042601ed4266d175b37ff0d3e6d079f3b30.2MBDownloadDownload
Firmware 6.2016d8cacc0cdb00a2a6a8c1b77d7dd13627.6MBDownloadDownload
Firmware 6.10610d3d9ed39befa9c10ce139df01ebfb27.5MBDownloadDownload
Firmware 6.00a734c9829b20d17d7fc7a149d8274a8a27.4MBDownloadDownload
Firmware 5.70 (Only PSAR)42601831bf10e9bbf296c3ab3e78238419.5MBDownloadDownload
Firmware 5.55d7574bf9504c957e92d98470f1699a2726.3MBDownloadDownload
Firmware 5.51148d2a024741df54eacabbc79d9f301426.3MBDownloadDownload
Firmware 5.50eacd91e92abf817ff4ceaf02258f73a626.3MBDownloadDownload
Firmware 5.052b0581f4a8752e4171cbdb7a406a2ec025.8MBDownloadDownload
Firmware 5.03565c702771472445342a3b8c5657896125.8MBDownloadDownload
Firmware 5.0241b80591c6024a278945f1cdd72aa89225.8MBDownloadDownload
Firmware 5.0146e66cef9ec8a63eb5af2df0a53e6b5725.8MBDownloadDownload
Firmware 5.0060aa0356d4c66f589b71cfc9abc0871325.9MBDownloadDownload
Firmware 4.21 (ZIP)a842978fa35500073c20bf02777997a521.6MBDownloadDownload
Firmware 4.21 (Only PSAR)edea8c2151a81ebb3c6f145f9034f5a118.4MBDownloadDownload
Firmware 4.20 (ZIP)18bf0cd6386c44322c8d0db561eb0b3021.6MBDownloadDownload
Firmware 4.058497dd2b3485e934b073948b558221c324.5MBDownloadDownload
Firmware 4.01c593abc023aa9b215710df6e263b3fff24.5MBDownloadDownload
Firmware 4.00bf8d5081adc08457debe062270646c4524.7MBDownloadDownload
Firmware 3.966046ec031a2757a59fbc2065484b1fe124.7MBDownloadDownload
Firmware 3.9532720ecf54e656c401ffc92d33fe62d924.5MBDownloadDownload
Firmware 3.93af24e8ca2f6b54fd98409dbc2a62715724.5MBDownloadDownload
Firmware 3.9064bae5dd0d0f836baedf915fb106e9cc24.5MBDownloadDownload
Firmware 3.80923297bb6c6aead603d745e9e724fea022.8MBDownloadDownload
Firmware 3.730c1668bb95c6e92091c743a53b80999722.5MBDownloadDownload
Firmware 3.7205d9fe3c72a263d8a4490a8ec727aad322.5MBDownloadDownload
Firmware 3.716babee6e1415ae27999928566adbd56922.6MBDownloadDownload
Firmware 3.706942dccc46cb92161ed1568a784b2ded22.6MBDownloadDownload
Firmware 3.60 (ZIP)3966394f594affc7e4b5f5d3030e708c20.2MBDownloadDownload
Firmware 3.60 (Only PSAR)eaa13343c70d9b0337c75b295474c69a17.3MBDownloadDownload
Firmware 3.529e8da3f26e06b6b04fd31f3fda6069a520.6MBDownloadDownload
Firmware 3.519593f0783ebb97f0ea0c0ed0ee66dec520.6MBDownloadDownload
Firmware 3.50b4e70aea4b09e74aacbe2d83b8868f2c20.5MBDownloadDownload
Firmware 3.4058101e3f6e897725ac55ec1ae3dc07a021MBDownloadDownload
Firmware 3.30842515d85bc1645e3ba2e98533968c6221MBDownloadDownload
Firmware 3.11ccd985a6145ecd572aa4a94d483404fa20.9MBDownloadDownload
Firmware 3.1081b8ca8f63db44996f6f5fbf03c5dee120.9MBDownloadDownload
Firmware 3.03a1dd70c8e8f12d83d954951d9e0d683820.9MBDownloadDownload
Firmware 3.026a1530e6a1c7ec7bf9f50464d4110e0c20.9MBDownloadDownload
Firmware 3.011dc76eab462c2f9c71aa8536659682f820.9MBDownloadDownload
Firmware 3.00fd90b0c3ffa0fc73cfecae4945ac3c4720.9MBDownloadDownload
Firmware 2.8265e58702b08898da4f155c8d217e5f4119.6MBDownloadDownload
Firmware 2.814726589a847329cb03ac5ffd5096d62e19.6MBDownloadDownload
Firmware 2.808a0d85b6e2d259a3b5710378d892a1ef19.6MBDownloadDownload
Firmware 2.71d6f3d5dc926c00a8a63336100501881319.2MBDownloadDownload
Firmware 2.70aea0541d63cb1d5112284efb1fb833a018.2MBDownloadDownload
Firmware 2.60a69a022fce43b614a8cb305786f5985517.9MBDownloadDownload
Firmware 2.5000df561c8215e42b16661ecde4c57e1417MBDownloadDownload
Firmware 2.01c9629365e58daf4973019c78727f521c16.4MBDownloadDownload
Firmware 2.00 v250c7032754835b588319c1a6c652cdc016MBDownloadDownload
Firmware 2.00 v162f6d3d18038f463092e3d6653fae19515.9MBDownloadDownload
Firmware 1.52b976783070c12c4ed81cc2778522249113.3MBDownloadDownload
Firmware 1.51ad79cbaa4838d9ed2a16f403567a522214MBDownloadDownload
Firmware 1.50e32eb27980ba8b291eb803e3397e4b2413.3MBDownloadDownload
Firmware 1.0047398e49360ab021c3ffa42cac3e6f1514.3MBDownloadDownload
PSP Go Official Firmwares
VersionMD5 HashFilesizeMEGAArchive.org
Firmware 6.61fd0f7d0798b4f6e6d32ef9583674052726.8MBDownloadDownload
Firmware 6.60d1fe58798b133ea4343b4bb1a25d442626.8MBDownloadDownload
Firmware 6.39116ae536544173dc08ee83aeb9d226fd26.6MBDownloadDownload
Firmware 6.38cc57a2df91914b0cb986e039c3deff9a26.6MBDownloadDownload
Firmware 6.37d403726b95c3577c33195e491cd8c8a126.6MBDownloadDownload
Firmware 6.35b1470a9c6733fa4ecd69612af3aff41626.6MBDownloadDownload
Firmware 6.312a0e2a454e8c16cedceb87d23634ecbd26.6MBDownloadDownload
Firmware 6.3083e93aed9483b508726b81c730b55fbb26.6MBDownloadDownload
Firmware 6.20ae20575ecff8380214e8c43eef466ca826.5MBDownloadDownload
Firmware 6.10db20058952ed21287439c1c70b56153526.4MBDownloadDownload
Firmware 5.70 (Only PSAR)42f72f78f4fb85a3de273e4cbdd14ce219.9MBDownloadDownload