Image Background Color

Sets a checkerboard (or color) background on images viewed standalone.

За да инсталирате този скрипт, трябва да имате инсталирано разширение като Tampermonkey, Greasemonkey или Violentmonkey.

За да инсталирате този скрипт, трябва да имате инсталирано разширение като Tampermonkey или Violentmonkey.

За да инсталирате този скрипт, трябва да имате инсталирано разширение като Tampermonkey или Violentmonkey.

За да инсталирате този скрипт, трябва да имате инсталирано разширение като Tampermonkey или Userscripts.

За да инсталирате скрипта, трябва да инсталирате разширение като Tampermonkey.

За да инсталирате този скрипт, трябва да имате инсталиран скриптов мениджър.

(Вече имам скриптов мениджър, искам да го инсталирам!)

За да инсталирате този стил, трябва да инсталирате разширение като Stylus.

За да инсталирате този стил, трябва да инсталирате разширение като Stylus.

За да инсталирате този стил, трябва да инсталирате разширение като Stylus.

За да инсталирате този стил, трябва да имате инсталиран мениджър на потребителски стилове.

За да инсталирате този стил, трябва да имате инсталиран мениджър на потребителски стилове.

За да инсталирате този стил, трябва да имате инсталиран мениджър на потребителски стилове.

(Вече имам инсталиран мениджър на стиловете, искам да го инсталирам!)

// ==UserScript==
// @name        Image Background Color
// @namespace   leaumar
// @match       *://*/*
// @grant       none
// @version     2
// @author      [email protected]
// @description Sets a checkerboard (or color) background on images viewed standalone.
// @license     MPL-2.0
// @icon        data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAQAAAAEACAQAAAD2e2DtAAAkMUlEQVR42u1dCVxUVftmE0QWARFcABcEFAQ3VnEBERURFdFwXzMr91zT0kpNM9PSPssWtczUstLKstSvsszczVK/3BCVRUEckWETeP7nnHtnu8Og8HdmLnbO+Ymsoz/e5TzPe9/nPRYWfPHFF1988cUXX3zxxRdffPHFV3UXLHU3/4382wxvpbe5Kzz2Zqdmtibbhuw64rYV/6afo19TuwL/rT1OxlcZ3hZ2qAt71IMDHMl2Ipv+7UA+Y0++Yke+Q+UI3Akem7i3ZpFelxjZEc5wRQM0hCcaobG4G5GPGpLPuqI+cQgH4gp2LCdwN3gMIt9GNL0TMa87MbVXUYtiv+LWCCwJRnBJO4QgGG2vh+S3yQlQ+Bb6KJsQV3AjbuJAfsqWO0HtNb6VmPLtSdS7EKM2IYYPKAlWhiICXRCLePRGAvqSnUDeiyef6YpIdCwJSQ9S+N72vudJHMaJOI6dygn4b7X2Rb49MaEbiXqf4oCC9ghHN2Lq/ngCI28/deD5bxd/unzzyk2vf7Zsx5KTs47OwEjylQHogxjiIu3y26T7kmzQgOSCeiwT8DxQq2K/DkngjiSGG6F5caAyjJi+D1Iw+sysN9aP/bbLyYCrDfNc8+vfcyh0KHLJd7nXMqNNWuzxEd/N/eirl+5MwGCSF7ojNDv4WiuCENyIG9mTV+R5oBbFfj2S9j3QLKstwkhyH4CR/104Y3vXU01zbO9bwNC2Kbcvbpwbc+KpL9etujoRAxGH8CvtbvoSiOhCMIEdzwO1w/w09hugaXEAOpJ0PqBo3Jq1Pf7wzLVUG9qqwpptK/UfQv4rNI7gWNQis8fRV967MxHJ6KEMv9S20JsASCfyyjQPcBeQrflp6rcnp7aHoiXaIhqJBWPfW93jmJNSNDysK4Q6j370W7LP25Cvqz7jXND59JtvYzSS0PVWB3IYeBKSaM9dQN7mJ6lf2eSuvyKUpO8hB17o/7PLPTG9V1RueOm2YvZVO4Gy72+7X0YqeiI0p3VuU3IUUEjI0YAszU9Pflc0SQ8iKD6hbPQLm1vesBRT/sMZX5MN6MtZi4dCi4xp29MnIRGRxW2UXuRfEFyAZwE5mj/PpzgQndH/2HMpBxrcVaV9C9RkswOB/Wz9gr4Hdy4iUDI6O5igAe4CMiR+NPm7Kr2yg9EFybsWxx6zLhcSf82Mr3UgsFdwKI45sXk5BqFrdnCeD3MBhgX4b18u5rcnZ79XHjX/oPdeDztnVU4Tv2W1Er+hPCDAQpuyiLPblyMFXUuCQLEAhYMcCcjC/JT4Oec2LW5Nkn/yF0uCLwqms/5/G1/XBSwQeGX9GyQLRKcHKZsQrlFXqAtwK5jXAaxhRxi6x40AAv36f7Qs+owA+ywfkflVziSggYizP7yI/ogo9oMHHAUkwK1g/tO/QbovOiJh94LYY3b3LVhPh8Uj3qpSUfcTh2YjISdM0RINGBLgOcDs6d+l0Ptme8Tljh/4X8eiR5n8pS5A39YpS92HUeiBtgQJ1OfHgLnTvy1J/55XAwn4e2LuFtd8jaGMsa1ZndA1f+EmDEF0sT8/Bswf//ZwU7RUhKHffxf6XxPMb2k0B7AQX9sv/fA89CWHDiWE9jwHmBP+OaNJWnuSkEcP+kng/cY0v1Acom8H7y8Zhe63g9CI5wBzwj8HuN/yRyRS3n/TLV8o+VoYfVMXa6DY8hphA6FoxnOAWeEfvNJD0btkYrfTj6Lu97BIgL5N/A2jEVPcBp4sB3AHMAP8cxTh39BFW+xKjZ/+tQpDxAXq33t3NZKUoQQHuBBX5IeAGeCfa1HzHAL/zs8OuqKJTFNs4aBJOIjh6EK4gDuvB5in+tf4SjvEYNST3zJ+bjLzq3JAs8yjc9C7oB0ak/8LPwRMX/1TtFJGYuA3S71uCT5hYcJNc4BlxeKNSL4bQYAgPwRMaH5q67qoj6ZXOyIe45IOmTr+NfWAhEMYQQ4BP3YIcCZgsvi3JfSvYQZ99jdk3fr6Baaif/pcoMWNrMnoea8tYwIcBZiS/hX6ZIYiQfFs5N+mo3/6OcCx8JOV6HenI5rCmaMA09E/J3imB6Ebhs3bVqfMdPSvMiYwcwdSlAIKsOMowFT0z03RMjccSSfnB1wzLf3TRwFJv2AYOhf5wo3DQFPRP2dG/2IxetQP5oB/urvT2bIx6HY3gMBAWhDmDmAC+ud+y680Esmfv9bottDFby7j00Og5Y1/piC2uDUach5gfPpno0X/xvc+Yv74t4DXzeOz0PN2W3gQZsJ5gNHpnyM8CP2LxhOvv+9YSE9/SzMan/7bTW/9Oh+9GBHkDmAC+uda2CwzDH2zpnb6n7non+5uoNi7CL2zQ1hfAHcAo9O/RtfaEvo3fMZO2vdv7vRPM4Dn7V+fJxkgmDuA8eO/Hmv+Ckf/Qy/4ZpiP/unuJjm/zEf89RB+BJiC/tHmrziMST0gB/gnbJ/sE88h7l4QB4HGpn+q5q9BH7/RUGGczv+a7A7/ZE5CbHoQp4FGr/7DK70TeuPJ2BPyiX8LdD6dOw5di/3QgBeCjAn/CP1jzV+pSzbZF5ur+l/Zs4DUfRiKqJuteCnYuNV/16LmWeFITJvZ7pI86J+wHYpnbcUgZXghfxhkVPhH6N/lEMRg5DO75ZP+qRO65L/1JhLRTunFHwcbs/rfQOF7NwID9r3ULNt4yr+a7KDL/0xF3O22BbwKYMT4r0/oXwf0xNjkg/KJfwEBPLEfwxF9I0CEgNwBjEL/GpJfcBQGv7fONd88zV+Gtodi8QcYgE6FvCnUqPTPOz0UfYomdf1TTvCP7pBL3yxAPOi0EN4WbjT6R5u/umLoC5/QwQ9yoH/qQ6B8xHeEAkbnBPCeYOPRP7ei5rnh6Hd2TmCaXKr/qsdA3tmfLSUMoH1eM4JSOAU0Ev0TtT/j98ip+ifsofswAt3Sg9iQCM4AjEP/bvlR7c/XrzbNMb32p+rdIvOnF9FPEXqnOVzZmBg+NPIRml+i/Un8XU7xL/w/Jn9FCCCNf08+IMI48E+t/Vn7jrNSNZ1HLrvDhfQZ6JsZVthMjH9+ADx6+idof/KejTgrJ/pHYahd6fKNSEU0cVAPPhzCOPGv1v7M2WFTJi/6Z4Gex/EkeqV3ghcrAPH4Nwb9E7Q/x5/3vyY3+udxZ+sqDCqNukUHQ/AuIKPQP7X2Z8SP8qN/w/djDOLS2oNOC7bjQ+MfffwT+nezVWkEkrev9Mwzr/ZHf7e6cWQh+ivCFS3hxgfDGC3+WfPnuPijcop/AYbO/pzQv+7X2qIRq/9z+veIHYCd/+m+CEPy8g0ORebW/kh3+PncKWr6xx8AG6X+53DPMzMQMdcntjsnJ/pHh0LVK16zAU9o0T8e/4/cAQgBvOGNECQ89wGd/Ccv+JfwByYg/mpHPiXcmAigPkmvne6k9PhFFXdy2Y1zd61AcmHULT8+F9B4DlAXrjd9EX5tRMfTmikc8tjj9mI0ehB42pjTP6M6QFELRFwZ5f+P9l095t9t0s/MQ1JuOPnfuXH4Z8wjwOVOC8IBUiKOy+UAoDDUqnzBpxgmPv3j9M+4GABeJR2RNOxLOR0B0X8pn0ZCZii8efXf6CwAje4Fo+d/ltVTysEF6CHkVPjufzAEnW8EoCEc+NM/YxeC3e/6ISpneNQRuZz/A37FOPTk9M+EhwBCEP/OK75pxr0C6uG29829SzBQGaloxa+JM1EtEO7X/QgQTFq0zj9Nuw5vnuavSV9jFGKvtOP0z3Q5wBmNhGtgf1yU/JtzoVnFH5cvzkK/nLCi5pz+mQ4H2MPltnd2MLpiMKZv3pZ0iTaEmPoooP9mnbKXP8JQdOHNn6bNAbQl3K2wWWanoniMwYv4YMAN8/CBmFOYiN7pobz5y7Q5QJwJgIDCbnkjMPf8Zn+F0C1uWvrnfnfzGqQQRiLQPw7/TJgD2FAY+NGZoJg7+LR2Y4jpCsRDfsJYxKV1QBOV+Is7gOkcgGaANlQWtmFj/UKNLsBKMq7deLtl5sFFGHA3QuHL6Z/pYWBduMKHTgUqmxyt1xiSRPxCpIdGbP6a+iVGoPu1YNb8xcWfJj8APBFAh8I+v12qCwjDbZThVfir2Lpx7gG4kDEdiVnhvPnLPDTQFc3ojeBn52rfCWLLTLMWwjqFySQ0jUP/6pau/JBqfzLb8OYv85z/jRGIWIwavVfaF9wXd4jxi0Qn+A4DdWb2PKrd6xjX/pivFFyPgK6WCEfyZys8te4Eoee9PXYzw5eQXcHeu4f3EfEIEQGbAJ63/XWu/TFfIbg+miKY3gnSR+9OkImi+ekqE/8GrmIxWojfYfsInGDkPoxhzV9c+2OG+HdAQ7SisvBV72nrAujbljgqml617qNUfO8IJpBc/SjSv//1owvQPzeCa39MbX5L1VQwKgvPfzb0vJT+vawV/6pVQVygTHzvKySogFyN6Z8l5nxGRz9w7Y+Z6d/0z2lHoHb6j0Q6i/5ySFe52iny8DY6/L/oYeS5vMlc+2M++ueG5koqC1+gfSeIYMoPmYlLUfnSIIILmE+4W820Pw7Fb73LtT/mg3/OjP71wOih+6XwLxkFzPwVMLxKCSYQ1kGMrNExkHgY47n2x3z0z53gvAgM+mi1u0IzFJaSO2fsFUFf1auC5IFy0Rk+ExHBwz8zaJqz61Wu/TFX/NOpYPROkF6Y0OO4NP6nVAL/DC0NIriF0GrF//jvePOXueJf8/g3ddmmuiW61f8AnGbRXYaHXUKm+JGE8cPXCAPT/pqDfrnhvPnLHPCPPf3LCUXfrGntLkrp34pqxD/UlYJbiNOpD1oZbClh2p+KBR8jVWz+4vTP5PSPPv1vje4Y8cwuafrvjiwW0+Wo3lpjoDJY+cCpyJNFBP7x6r/56F+L0nAM+OFlH607QeowCPdJlfTP0DqLttCMl7VhNYU+WT4F2jGvyQg+1zcsQyJCr7Xi1X/z0L8mCCIZe2zyL9L4H4riB9K/ytYsvfgfdAkfHv404axtmTT6Ay4sXIf+iLwopH8O/0xM/xxI1PkiEikb1rrc09A/GrsN8JMB+lfG8L6hdYCVgmzECKev51K4dQcWY17Z3OUftz/ndM+mTCj+eN/o++POuST6I/Pb5Hpx9m8m+pdJr4ScqH8nyOwHwr/7esUg6hxD9YrBQw+TFxufMwpDMPT6U0tXP70l9cvxn65cdXQyktEDofmtc+npb8/Tvznonz+6YOiLW2wld4IE4zyL88ro329YhesGnGILM30dLczfPPvn5RhRkJgTm9mNUM0YxCOBRH1f9CIYMywvWOFLkn99Zn6e/k0M/wj9U4Qi8fJzQXp3grxZafyXsrjvRb4eik0MIUjpX1ct+ifgiSm7MRa9b0ShDVrdCMgNRFBJO7QraJ8XnNumqAUak7PGieQibn6z0D/a/D3ySb07QeKRy0xdUWmM24qn+yCxSKzpElihB//aX0x7DknZUcV+BGw2JNujoLGyqdKLfNSIfORGQGg9Av1shFIBt43p4B9t/mqBcAzctUz7ThAhgX9eKf2jwC+bZHELFq70u90wlVUKVa2i/tDcLc6Gu99/dRMBBV2zgkiku5Ajx4FsR+J6zuQP/cieGJ++GDe/WehfW/TEuH6HpPE/lkV05fDvVTHGrdVxHoDXkMG+Nk0v/uNO4Emm7/Mmx0098qU6ZNuKm75vw41vLvpHm7+iMHjteielrvanEQ4ZfPp3hPyQJsbrqEu9MdhDdgMt+seGuyu2rkZKqUrfZ8uMrbstufFN7wCq5q9O6FM6KVLvTpCFVdC/Cew77LX6eG1FZ7CFlx79G3aA6ftUDZ42KoNrNreHeeCf0PzVFcPmbrcp16V/obhssPmrGG+RH5Q2fVlpJX3tRpBWGYdfEIe7c32fzOifm6D9+Xuev572550HlH/+xExC2vUe8ug87RPyyXM7mb6PN3jKkP6J2p+RP0jhXz/cNVj9L1ejgh+Q8kCVcNj5m1N5g6dc6R9t/lLfCaJp/qqHr6t8+leu1gQpsQmdDXQA0wZP++LV7/EGT3nSP7X2p5fenSCTHqL5Q9MBfB1LiCcZGO5OtSKCvo8/4pEd/fOj2p+V7zsU62p/fHFcov0x/BBIlSPOEERgp9f61fj2F69hUGkkb/CUk/nV9C+nExLyJnf8n5T+LalG85dGE1SATnrxP4YPd5cx/WtNtT9Td1pKtD+d2fO9smo0fwnfuVGP/rVOPz0fSbkRfLi7HOkf1f70P7KwZaZu85cFAXXVbf6icPAc2kmav6wq5m8T9X28wVNm8I9qf4LQA2NS/yuFfykE19ek+et5vep/57/yn6HD3Qt9OP2TG/0Tmr8GbV7jfle3+as+YfYPo/2RroNowl7BSk3/HAvXs+HuhP7x4e6yin+N9ufJ2JPS+J9W7d5/4agYpVcH6H+I6/vkGP+q5q9opL6yuW6pbvW/DSFz1dP+CGsHGwqh3fzlfWvPUj7cXZ7wT9D+JGZMD7kkbf5aWSPtTx4BE9Lmr4nfcH2fPOmf0PzVHSMn7Zam/xhk10j784Ye/Gt75Z/ZXN8nx/hnzV9U+/PdK943dZu/rPBpjbQ/fyEQmhliNJ/YlL38MW3+4sPd5Uj/aPNXHMYOPCiN/+Es9Vef/s3Ui//up8ueQp90freX7OifoP2JQsr6dS4FuvTPHT/XiP7tIxxPV/vT4O7GtzCYD3eXmwMI1X9R+xN9Rlr9n2sA/lVUSf/u4wk9+jfkZz7cXc70rwuGLvikjkT70w7/YxX9cgNVfkO84COG/LXTf4usnxfz4e5ypX/NFKHod3FW4FUp/VtrUPtTbsD4Gl2ALv2b+hVGIoYPd5cr/YvBqPHfSeFfb9w2qP3ZhIHYpZMN9HUBmlfqcOH6DD7cXY7wT639+WJ541ytZ3bkjx2+MKj9yUIwez4wBSd0Cr90ndDRBTDtT+kKOty9Cx/uLj/6R5u/mPan7+/S+B/PTF15ol+maewm8Z4tflb43mf14r/ncab94eNdZEj/RO3PmnecCjXNXzR2m+CwweavY6zPz441erG7uwnoU9HEPcTGmuo/G+5+Z9sqPtxdrvSPDn7uU/R0uN69Py9WCv+Ej58WY1yj+bEhtE9QAafo0b/h+zFGS/vD6Z9s4J9a+zN7h3W59N6fKwabv3ay9F5HXeJRJXsPLMRLeunf7/qRhaL2hw93lxn9E7Q/Safn+12Xan82GGT5JRimJ/ewUZvcXov+Cflk9ud8uLs84Z9K+zN6+I9S+Ncf+Qaq/zQj7Ec/0eDaTiCogC0l7d/h53OncO2PPOmfOPh56+sed3S1Pw749gHV/yJsEce8aN8DpDvnkzZ/1St+awPX/siW/l3tiHhMiD8mjf9nqijyVqg/n/EQNwP2PYwJvPlLrvSP3fu74sN6Eu2PH04+oPlLo/k5RTi/o+Hh7rm7VvDh7nKEf5T+scHPuVM6XpDSv2UP0fyl0fzQmwH7G3CAcd9jNG/+kiP9c2Lan+4YMfVLS0n674IbD6n90aiAgW1opicDD7x6Zh6ScsO59keO9I9pfw681CJLqv35qFrNXyoVcDbaSIe7ly/4lPDFrny4u/zgn2rw85ghP0nh3xAU1qj5a4EeFIw+o3waCdfCePOX/OCfOPj5wzfd8nWbv1ywr0bNXz+jEaODmhliTsoNb1Ptz40Arv2RV/wz7U9GR/TGkzGnpPBvRo20PxUYoRf/A37FOPTk9E9u8a9p/kp96SM7ifYnCH/XSPuzjT0T1Nb++Nzcu4Rrf+QJ/6j2JwyJ6TODL0ubv1bVSPuTixi95q9JX2MUYjj9kyP9E7U/E7+Wwr8euGmw+auq9bre07+QyxdnoV8W1/7ILv7V2p89S71v6Wp/rLG9RtqfM2gt0f7Uub/kIwwV7/bi1X/Z0T+m/en/qzT+RzLTV5/+TdeL/9hTmMgGP/PmLxnSP9b89Z+3nSXaHw8crBH9+1Fv8LO7YvMapHDtj9wcQKP96YOJnf+S0r/5NaJ/pRisR/+e+Ilrf+RN/4bO31qnTJf+dcAFA9qfqtcmlj2003/LzIOLuPZHrvSPaX/Oz2mdLm3+ettA/JdXOfotSxwCq938Nf1LNviZa39kSv9iMWrs91L4l4C8KumfITdYqgf/Ov6TMZ1rf+QI/4TBz+EYuHNF49sa0kZjty6+Mqj9UeCcnuZHVxdgraX9qVuy8gOkIpprf+RH/9SDnxP+kMb/BBb5lcO/+SRtvIDMKnUBmlfqdQxPioOfOf2TGf2j2p/OGPLGBsciXe1PCxypQvvTRBwOu1HPQb6Bs6T675m3/XWu/ZGb+bW1PwnKZ8LOS+nf4iq0P09pXfaiufmvmN0CkKRH/0buwxg2+Jlrf2QG/wTtTzcMf+4zK8ng5whcNdj8tZvgRm3tnxumqW/++49e+g+4fnwB+udGcO2P/Ogfbf4KQ9LJ+b43NPRPiN33KwV499lw90Q1TNS9+Y9Cw0ityd80n1hizg6u/ZEn/HNm2p8eGD1svxT+DcQ9g9X/VZIY19z8F4dkvfiPPJc3GQlc+yNH+idqf7asaijR/jjhO4PV/3xMrETzo1IBW2qNfqCHikPRune59keO8U+bv5qywc8T4o5L43+yweo/zQiZWIYQPc2PcBhYSpq/E3/ng5/lGP9C9Z9pf5ZttC/RVP/pW3+cMtj8VaF+0j+tkpv/9LQ/OV+/yrU/coR/dcXBz31vTm1/UUr/llf59K+0Gjf/TfiOD36WJ/1Ta38mfyVN/11Zda+syoc9mpv/NiJKXQ+Qmj/o6tm5XPsjW/pXGob++15qli3V/mx5qOYvzc1/1/CKqALWvfbVuvyFT7j2R670T9T+pPwsjf9UFD1085dGBfy3eO2Tdvx3/bPoafTh2h/50T+19uf9ta73dJu/3HCgWs1fFaIL/MnuA7fUOgycle+to4OfufZHjvRP1P50Oy2Ff8/VqPmrSJwKpF39Tz5ItT9pHdT0j8M/GdE/pv1ZtMVOMvi5Lc4yiFdd7c9WnalgdDfL3vcyBt6N5M1f8oN/ovYnbWbQFan2Z3WNtD85hExItT/P7KaDny+HEPrHm79kRv+Ewc8jJ3wjhX89iSlrov15Ta/63+5S2kza/FXUnFf/5QX/hMHPYRj49TKvHF3tjw0+q5H25zQCJIOfbe8v3Uy1P1cDufZHjvSPDX5OOiSN/9EsnZegumuqvvbnBBv8zLU/MqR/4uDndeudlTRaNQMbPPFbjbQ/ewlx1NX+NFRsWY0URN7y59ofOTmAqvmrE/qUTYr8W0r/FlQb/t1nDWCD9Ohf6gG19odX/2UF/9SDn+dts5EMfu6IizXS/nzIsod2+vfNOPQi1/7Ilf7Rwc/9zs4JuCbV/qyvdvyXs0mg0uYvC8zYybQ/vPlLhvRPGPw8avReKfxLhKJG0u9X9OBfp/9lTeODn+VL/8IxcMdrnhLtjz12G6B/5QYUAcI6Sl5Qo/2hzV/2Ja+/z5u/5Ez/4jG+zxFp/E98YPqvShegHf+9j2KCqP3hzV8yi3/h6d/glRscinQHP7fEMYPan7+xjY2FhEFdgHb1v9Htz1/DoNJIrv2R3/lP4v9Ge8Qrnu6kp/152eC1j2DjHfrie4kKWKoLUO1RP3Dtjzz5P+3+oed/yuTtUu1PFK5Vof0Rxry74lk2Hl4bJ6zX1/5cO/k8kkTtjz2Pf3nV/zzy2yDm1+lemVLtz4cGtT/5SGAQz1J9899N9dcvoAO0LpCk2p+KedtF7Q9v/pKZA1AC2ATBSJi0hUWtVvwPIqncEP17W4xxjeanCz4WC8UL9OI/6qyCan9COf2TIwOoD+/SUAwc/4XmuiZqVGdR0Xu/kr7/8+iojnHtm/9ScYqARm8J/XMsWreeDn7m9E+eDuCC5gQBDBm6V7d1e1oV9G8a+w4HLQG4Kt4bIlAv/pMOce2PfB2gLgFlLdEZw5J/0naANqz5qzLtTzmUWFyJxMNGy+jWWvTP69a3y5DMBz/L1QHsiVl8yQE+Urj6WWW4eQ8o/+wT2zy1W70tGe+XaoAm7uHaH3mTQHf4oVvB+O4nafwL5rPDuyz+yyt9zFMh3vz3MfEbCz2+r7vbpp2fg365fPCzbB2gHtyLAxCDcdFnNPFsjZ06Qk9Dmh9685+faGpbiekpnbQpW7RFrf3h8E+mDtAQrdHj8hQ6/99KLAIHsKsfyqp4/qfR/Jys4ua/bqdLJ3Htj3wdgPYBOMCjOBA9s6YEpmkgYGdcfmD7l/bNfz8QAqjLIeh79Qs+XEu1P3zws3wdgNYBPRGEXkfmURGoKgMksxJQdW7+u4MwvfhP+UVL+8PhnyzrgHVI9m6Etujz+wKfm5rngAur0QAqZIFd4rURGvM3zz7wMm/+qg0O0Bgh6Lt7qYfCQj3FZ3UVELAyB8gQ+YC29mfyLlH7wwc/y9gBhCcB7dBv+0r3uzQDWLMHQV89YNq3dC3X4wHtL6Zz7U+tcABneKEDBnzwlnOhKgO0YSMdH14BcJJRQR3tT+myjQQXduGDn2uDA3ijE5JXvSfcAmjDmsCvPGT8C/WAKXrxH3ecaX/44GeZO4DwLNAHoUhZttGmTJUBBj+g3VNaFHaVaH887mxdhRQ2+JnTP9k7gAua0WeBc3ZomkHmGewC1L8I4g/01tP+DNvPm79qkwM0RwRSZ36hKQSvfCAHUDnHJ6L0Q9v8vtd/X4AkRTgf/FwbHKAuXItaIgrDBDmINbsDZO9DcYBbeIe1fghgQkP/pm0n8I9P/qo1DkC7AaIxfNgBzRTQk1VOAVBV/qazsU+q01/1ELjtueyJ6JnRsdCH5BZO/2TvAPZoUNSKdgP0O6TKACFIMxj/qmPhDwLyVTV/zfP/OmUh59YuRQI6XWvFev95/MvcAWxYO0grdMPo+KOqMc7DmPGrqgLsJylDNfPbUn0AeNwZseePGeiL8LTWLP1z+FcrHMA9nw6EHdvtT9UzvFnMAcoNHgCbxcc+VurSD237Dj/39tsYSShBWLF/DkX/nP3XCgeg3QABiM1+mt4HJDwLXFMFBMzHcvIDFlq8n+7Gt8d9f2QeBqNHSUfC/T1Rn0s/aoMDCBfCe9wOQpzyKToRnKZzd8YBKh8FcRZT2MAX7ei3Ko86u3Y94f39EH2jPZoR/6DRz81fKxxA6AYIRPzJWb4ZQhmoOX7XKwIJznBKvOqZRr9qdqBXzpi9F2ZiCOJyw4sDlF4EUTiqkj93ALkfAGI3QHYIep+f3TJLQADhuK7V+Klxhc8JUtRN/falkec2r8Fo9CvtUtBO4UtcyYVkFFt+9tcuB2hMZWHfv+SRJ2SAkewBj24VQIEPCFWw0NL7Ucz/7O7Ts0lSiFOG5bZBUxL7Tiz1W3Pz1x4HYN0AmZ2QuPcVzzuCjGs6M36FFutXYB6xrxD9gnDcqiLm9Ia1JPYT0TkvhJwaHgT2qWOfm782OYAzsW17JG1a7aQUHGCtmPhVR8ApAvysdNQ+Prcm7b40g2J+ZRihkJLY5+avbQ7glROGARvWsnaQiobYo2P+Q4hjbV6Wovnrlnb7k5z7o9AXnbNDilrw2K/NDiAqg2k7yMr3aTuIFRrhVy0I+AmidU5+n5uTd6VPRwp65IQV+5PYd2OYn5/7tdoBfO5GIGXxx7b3aZLvjCwx9u/hTXbyW4m4v15J7KntKwlG7FsYfS+4iJ/7j4kDiO0gc7cL5Z2h7HZv4BJmixU/oeDTPHvGzgszSOzHlnbKaY0mPPYfDwegdwM2L41C6qTdAsx7Rqz4DRWNT89/u/s9j3/8Bon9BERlhxCH4bH/WDlAC9oOMn6P8Ex/Kxv+FAehQZyWhn0zZnyR8ywGITYntNiPx/7j5gDCcIjhg9hwiFYVH+AL+IkNHtZwKow/tutVjEACP/cfXwfwJVB/ROJv1AEaIBbB6oKvz815269NIbEfo+h015/H/uPnADbqfqDhXY8LZ34d1tdnRfh+4uGdK0js9ymNyguGD3vGZ89j/zF0AJoBSoaFnxDqgOJ8oPR5224+g2TEKHnsP/YZwBeRxYMDz6gawhwLEw5/uQzD0QeR2Tz2H3MHoBigOULPPNHyjBD7rdLmbCmYgIHonkkxf2Me+487CHTJ80HwkX5uaST278Ts2zMXgxF/N7I4sLCZOvb5Q57H1gHo42BP+C0c5nrW7cK0JddTEI/OBe1v+ZPYdyWxb8dj/3F2AHZTwN0GSq8NnXvNnj0akQhDSEZreMGdx/6/wwFsSIw7EibQJN2XnPitrrUq9IYHXODAY//fkwPq5jgRk7vf80TDfHfyniNv7vj3OADFATZpdTPqkZh3JH/qEeNzwvcvcwF6ENQhZrcVh/9b8cT/73MBK3ZPnJVK7Md/L/8+J1Bv/vvgiy+++OKLL7744osvvvjiiy+++OKLL5Ot/wNepdkmLOLI6QAAAABJRU5ErkJggg==
// ==/UserScript==

const checkerBoard = {
  backgroundColor: 'darkgrey',
  backgroundImage: 'linear-gradient(45deg, grey 25%, transparent 25%, transparent 75%, grey 75%, grey), linear-gradient(45deg, grey 25%, transparent 25%, transparent 75%, grey 75%, grey)',
  backgroundPosition: '0 0, 2vmin 2vmin',
  backgroundSize: '4vmin 4vmin',
};

function setBackground(node) {
  Object.assign(node.style, checkerBoard);
  // or assign a fixed color if you want
  // node.style.backgroundColor = '#333';
}

function getStandaloneImage() {
  const tags = [...document.body.childNodes]
    .filter(node => node.nodeName !== '#text');

  return tags.length === 1 && tags[0].nodeName === 'IMG' ? tags[0] : null;
}

function clearAllBackgrounds(upFrom) {
  let current = upFrom;
  while (current?.style != null) {
    current.style.background = 'unset';
    current = current.parentNode;
  }
}

(function main() {
  const img = getStandaloneImage();
  if (img != null) {
    clearAllBackgrounds(img);
    setBackground(document.body);
  }
})();