cannot download currency exchange rates

[eadmaster]

I've installed the latest build from here in Palemoon for linux.
The addon works fine with metric conversions but it can't download the currency exchange rates and perform conversions with them.

EDIT: i've tried importing the rates manually in prefs.js from an old FF installation, but it is still not working:

user_pref("extensions.converter.currency_data.date_EGP", "1512221324801");
user_pref("extensions.converter.currency_data.rate_AED_EGP", "4.811471");
user_pref("extensions.converter.currency_data.rate_AFN_EGP", "0.256791");
user_pref("extensions.converter.currency_data.rate_ALL_EGP", "0.157293");
user_pref("extensions.converter.currency_data.rate_AMD_EGP", "0.036429");
user_pref("extensions.converter.currency_data.rate_ANG_EGP", "9.897863");
user_pref("extensions.converter.currency_data.rate_AOA_EGP", "0.106513");
user_pref("extensions.converter.currency_data.rate_ARS_EGP", "1.026963");
user_pref("extensions.converter.currency_data.rate_AUD_EGP", "13.450918");
user_pref("extensions.converter.currency_data.rate_AWG_EGP", "9.890684");
user_pref("extensions.converter.currency_data.rate_AZN_EGP", "10.405063");
user_pref("extensions.converter.currency_data.rate_BAM_EGP", "10.750562");
user_pref("extensions.converter.currency_data.rate_BBD_EGP", "8.8365");
user_pref("extensions.converter.currency_data.rate_BDT_EGP", "0.214561");
user_pref("extensions.converter.currency_data.rate_BGN_EGP", "10.748915");
user_pref("extensions.converter.currency_data.rate_BHD_EGP", "46.880969");
user_pref("extensions.converter.currency_data.rate_BIF_EGP", "0.01007");
user_pref("extensions.converter.currency_data.rate_BMD_EGP", "17.673");
user_pref("extensions.converter.currency_data.rate_BND_EGP", "13.113783");
user_pref("extensions.converter.currency_data.rate_BOB_EGP", "2.556863");
user_pref("extensions.converter.currency_data.rate_BRL_EGP", "5.425784");
user_pref("extensions.converter.currency_data.rate_BSD_EGP", "17.673");
user_pref("extensions.converter.currency_data.rate_BTC_EGP", "195");
user_pref("extensions.converter.currency_data.rate_BTN_EGP", "0.273972");
user_pref("extensions.converter.currency_data.rate_BWP_EGP", "1.705846");
user_pref("extensions.converter.currency_data.rate_BYN_EGP", "8.772518");
user_pref("extensions.converter.currency_data.rate_BYR_EGP", "0.000882");
user_pref("extensions.converter.currency_data.rate_BZD_EGP", "8.790141");
user_pref("extensions.converter.currency_data.rate_CAD_EGP", "13.927592");
user_pref("extensions.converter.currency_data.rate_CDF_EGP", "0.011214");
user_pref("extensions.converter.currency_data.rate_CHF_EGP", "18.104614");
user_pref("extensions.converter.currency_data.rate_CLF_EGP", "736.989158");
user_pref("extensions.converter.currency_data.rate_CLP_EGP", "0.027282");
user_pref("extensions.converter.currency_data.rate_CNH_EGP", "2.678609");
user_pref("extensions.converter.currency_data.rate_CNY_EGP", "2.671332");
user_pref("extensions.converter.currency_data.rate_COP_EGP", "0.005895");
user_pref("extensions.converter.currency_data.rate_CRC_EGP", "0.031204");
user_pref("extensions.converter.currency_data.rate_CUC_EGP", "17.673");
user_pref("extensions.converter.currency_data.rate_CUP_EGP", "0.693059");
user_pref("extensions.converter.currency_data.rate_CVE_EGP", "0.190237");
user_pref("extensions.converter.currency_data.rate_CZK_EGP", "0.822383");
user_pref("extensions.converter.currency_data.rate_DJF_EGP", "0.098859");
user_pref("extensions.converter.currency_data.rate_DKK_EGP", "2.825201");
user_pref("extensions.converter.currency_data.rate_DOP_EGP", "0.366784");
user_pref("extensions.converter.currency_data.rate_DZD_EGP", "0.154083");
user_pref("extensions.converter.currency_data.rate_EEK_EGP", "1.209714");
user_pref("extensions.converter.currency_data.rate_ERN_EGP", "1.158811");
user_pref("extensions.converter.currency_data.rate_ETB_EGP", "0.645165");
user_pref("extensions.converter.currency_data.rate_EUR_EGP", "21.018492");
user_pref("extensions.converter.currency_data.rate_FJD_EGP", "8.530453");
user_pref("extensions.converter.currency_data.rate_FKP_EGP", "23.811962");
user_pref("extensions.converter.currency_data.rate_GBP_EGP", "23.811962");
user_pref("extensions.converter.currency_data.rate_GEL_EGP", "6.520411");
user_pref("extensions.converter.currency_data.rate_GGP_EGP", "23.811962");
user_pref("extensions.converter.currency_data.rate_GHS_EGP", "3.929814");
user_pref("extensions.converter.currency_data.rate_GIP_EGP", "23.811962");
user_pref("extensions.converter.currency_data.rate_GMD_EGP", "0.372848");
user_pref("extensions.converter.currency_data.rate_GNF_EGP", "0.001957");
user_pref("extensions.converter.currency_data.rate_GTQ_EGP", "2.403849");
user_pref("extensions.converter.currency_data.rate_GYD_EGP", "0.084985");
user_pref("extensions.converter.currency_data.rate_HKD_EGP", "2.262286");
user_pref("extensions.converter.currency_data.rate_HNL_EGP", "0.746984");
user_pref("extensions.converter.currency_data.rate_HRK_EGP", "2.785431");
user_pref("extensions.converter.currency_data.rate_HTG_EGP", "0.280624");
user_pref("extensions.converter.currency_data.rate_HUF_EGP", "0.066989");
user_pref("extensions.converter.currency_data.rate_IDR_EGP", "0.001307");
user_pref("extensions.converter.currency_data.rate_ILS_EGP", "5.070536");
user_pref("extensions.converter.currency_data.rate_IMP_EGP", "23.811962");
user_pref("extensions.converter.currency_data.rate_INR_EGP", "0.273955");
user_pref("extensions.converter.currency_data.rate_IQD_EGP", "0.014933");
user_pref("extensions.converter.currency_data.rate_IRR_EGP", "0.000508");
user_pref("extensions.converter.currency_data.rate_ISK_EGP", "0.171164");
user_pref("extensions.converter.currency_data.rate_JEP_EGP", "23.811962");
user_pref("extensions.converter.currency_data.rate_JMD_EGP", "0.140737");
user_pref("extensions.converter.currency_data.rate_JOD_EGP", "24.908986");
user_pref("extensions.converter.currency_data.rate_JPY_EGP", "0.157619");
user_pref("extensions.converter.currency_data.rate_KES_EGP", "0.171556");
user_pref("extensions.converter.currency_data.rate_KGS_EGP", "0.253531");
user_pref("extensions.converter.currency_data.rate_KHR_EGP", "0.004379");
user_pref("extensions.converter.currency_data.rate_KMF_EGP", "0.042676");
user_pref("extensions.converter.currency_data.rate_KPW_EGP", "0.019637");
user_pref("extensions.converter.currency_data.rate_KRW_EGP", "0.016314");
user_pref("extensions.converter.currency_data.rate_KWD_EGP", "58.619054");
user_pref("extensions.converter.currency_data.rate_KYD_EGP", "21.200333");
user_pref("extensions.converter.currency_data.rate_KZT_EGP", "0.053333");
user_pref("extensions.converter.currency_data.rate_LAK_EGP", "0.002123");
user_pref("extensions.converter.currency_data.rate_LBP_EGP", "0.011655");
user_pref("extensions.converter.currency_data.rate_LKR_EGP", "0.115029");
user_pref("extensions.converter.currency_data.rate_LRD_EGP", "0.140793");
user_pref("extensions.converter.currency_data.rate_LSL_EGP", "1.283908");
user_pref("extensions.converter.currency_data.rate_LTL_EGP", "5.481963");
user_pref("extensions.converter.currency_data.rate_LVL_EGP", "26.932091");
user_pref("extensions.converter.currency_data.rate_LYD_EGP", "12.955843");
user_pref("extensions.converter.currency_data.rate_MAD_EGP", "1.881134");
user_pref("extensions.converter.currency_data.rate_MDL_EGP", "1.027502");
user_pref("extensions.converter.currency_data.rate_MGA_EGP", "0.005496");
user_pref("extensions.converter.currency_data.rate_MKD_EGP", "0.341243");
user_pref("extensions.converter.currency_data.rate_MMK_EGP", "0.012979");
user_pref("extensions.converter.currency_data.rate_MNT_EGP", "0.007246");
user_pref("extensions.converter.currency_data.rate_MOP_EGP", "2.196074");
user_pref("extensions.converter.currency_data.rate_MRO_EGP", "0.04974");
user_pref("extensions.converter.currency_data.rate_MTL_EGP", "25.84762");
user_pref("extensions.converter.currency_data.rate_MUR_EGP", "0.527783");
user_pref("extensions.converter.currency_data.rate_MVR_EGP", "1.147588");
user_pref("extensions.converter.currency_data.rate_MWK_EGP", "0.024345");
user_pref("extensions.converter.currency_data.rate_MXN_EGP", "0.948846");
user_pref("extensions.converter.currency_data.rate_MYR_EGP", "4.321047");
user_pref("extensions.converter.currency_data.rate_MZN_EGP", "0.289721");
user_pref("extensions.converter.currency_data.rate_NAD_EGP", "1.286251");
user_pref("extensions.converter.currency_data.rate_NGN_EGP", "0.049078");
user_pref("extensions.converter.currency_data.rate_NIO_EGP", "0.573166");
user_pref("extensions.converter.currency_data.rate_NOK_EGP", "2.133484");
user_pref("extensions.converter.currency_data.rate_NPR_EGP", "0.171217");
user_pref("extensions.converter.currency_data.rate_NZD_EGP", "12.170649");
user_pref("extensions.converter.currency_data.rate_OMR_EGP", "45.922981");
user_pref("extensions.converter.currency_data.rate_PAB_EGP", "17.673");
user_pref("extensions.converter.currency_data.rate_PEN_EGP", "5.463905");
user_pref("extensions.converter.currency_data.rate_PGK_EGP", "5.500494");
user_pref("extensions.converter.currency_data.rate_PHP_EGP", "0.351646");
user_pref("extensions.converter.currency_data.rate_PKR_EGP", "0.167668");
user_pref("extensions.converter.currency_data.rate_PLN_EGP", "4.988709");
user_pref("extensions.converter.currency_data.rate_PYG_EGP", "0.003116");
user_pref("extensions.converter.currency_data.rate_QAR_EGP", "4.763616");
user_pref("extensions.converter.currency_data.rate_RON_EGP", "4.538163");
user_pref("extensions.converter.currency_data.rate_RSD_EGP", "0.176131");
user_pref("extensions.converter.currency_data.rate_RUB_EGP", "0.300106");
user_pref("extensions.converter.currency_data.rate_RWF_EGP", "0.020594");
user_pref("extensions.converter.currency_data.rate_SAR_EGP", "4.712423");
user_pref("extensions.converter.currency_data.rate_SBD_EGP", "2.257529");
user_pref("extensions.converter.currency_data.rate_SCR_EGP", "1.267336");
user_pref("extensions.converter.currency_data.rate_SDG_EGP", "2.646242");
user_pref("extensions.converter.currency_data.rate_SEK_EGP", "2.115387");
user_pref("extensions.converter.currency_data.rate_SGD_EGP", "13.123726");
user_pref("extensions.converter.currency_data.rate_SHP_EGP", "23.811962");
user_pref("extensions.converter.currency_data.rate_SLL_EGP", "0.002323");
user_pref("extensions.converter.currency_data.rate_SOS_EGP", "0.030543");
user_pref("extensions.converter.currency_data.rate_SRD_EGP", "2.372852");
user_pref("extensions.converter.currency_data.rate_SSP_EGP", "0.135671");
user_pref("extensions.converter.currency_data.rate_STD_EGP", "0.000858");
user_pref("extensions.converter.currency_data.rate_SVC_EGP", "2.019218");
user_pref("extensions.converter.currency_data.rate_SYP_EGP", "0.034316");
user_pref("extensions.converter.currency_data.rate_SZL_EGP", "1.28737");
user_pref("extensions.converter.currency_data.rate_THB_EGP", "0.542254");
user_pref("extensions.converter.currency_data.rate_TJS_EGP", "2.004343");
user_pref("extensions.converter.currency_data.rate_TMT_EGP", "5.049449");
user_pref("extensions.converter.currency_data.rate_TND_EGP", "7.123337");
user_pref("extensions.converter.currency_data.rate_TOP_EGP", "7.711281");
user_pref("extensions.converter.currency_data.rate_TRY_EGP", "4.516248");
user_pref("extensions.converter.currency_data.rate_TTD_EGP", "2.625285");
user_pref("extensions.converter.currency_data.rate_TWD_EGP", "0.588776");
user_pref("extensions.converter.currency_data.rate_TZS_EGP", "0.007866");
user_pref("extensions.converter.currency_data.rate_UAH_EGP", "0.65184");
user_pref("extensions.converter.currency_data.rate_UGX_EGP", "0.004863");
user_pref("extensions.converter.currency_data.rate_USD_EGP", "17.673");
user_pref("extensions.converter.currency_data.rate_UYU_EGP", "0.609357");
user_pref("extensions.converter.currency_data.rate_UZS_EGP", "0.002182");
user_pref("extensions.converter.currency_data.rate_VEF_EGP", "1.769951");
user_pref("extensions.converter.currency_data.rate_VND_EGP", "0.000778");
user_pref("extensions.converter.currency_data.rate_VUV_EGP", "0.164851");
user_pref("extensions.converter.currency_data.rate_WST_EGP", "6.942355");
user_pref("extensions.converter.currency_data.rate_XAF_EGP", "0.032042");
user_pref("extensions.converter.currency_data.rate_XAG_EGP", "290.738419");
user_pref("extensions.converter.currency_data.rate_XAU_EGP", "22");
user_pref("extensions.converter.currency_data.rate_XCD_EGP", "6.539379");
user_pref("extensions.converter.currency_data.rate_XDR_EGP", "25.071286");
user_pref("extensions.converter.currency_data.rate_XOF_EGP", "0.032042");
user_pref("extensions.converter.currency_data.rate_XPD_EGP", "18");
user_pref("extensions.converter.currency_data.rate_XPF_EGP", "0.176135");
user_pref("extensions.converter.currency_data.rate_XPT_EGP", "16");
user_pref("extensions.converter.currency_data.rate_YER_EGP", "0.070621");
user_pref("extensions.converter.currency_data.rate_ZAR_EGP", "1.285895");
user_pref("extensions.converter.currency_data.rate_ZMK_EGP", "0.003364");
user_pref("extensions.converter.currency_data.rate_ZMW_EGP", "1.736412");
user_pref("extensions.converter.currency_data.rate_ZWL_EGP", "0.054825");