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I use responsive mode to take screenshots of the entire site at the highest possible resolution of 9999 x 9999. I work with maps in very high resolutions.
Problem: if the map is in grayscale I can take a screenshot of the page in the highest resolution without any problem but if I switch the same map to the normal RGB mode I can only use the resolution 9999 x 3358 - about 1/3 of the maximum resolution, if I increase this resolution, mozilla stops responding but there is no error information.
Equipment: 16Gb ram, Nvidia Geforce GT635M - 1Gb ram, Intel Core I7 3610QM
Are there any settings in about: config that can be changed to solve this problem or some other solution?