yoshi [ ~ ]$ icecat &
[1] 3400
yoshi [ ~ ]$ 1546429042742    addons.webextension.tortm-browser-button@jeremybenthum    WARN    Please specify whether you want browser_style or not in your browser_action options.
1546429042744    addons.webextension.https-everywhere@eff.org    WARN    Please specify whether you want browser_style or not in your browser_action options.

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.447: failed to create cairo scaled font, expect ugly output. the offending font is 'DejaVu Sans 12'

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.448: font_face status is: file not found

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.448: scaled_font status is: file not found

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.448: shaping failure, expect ugly output. shape-engine='PangoFcShapeEngine', font='DejaVu Sans 12', text='●'

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.454: failed to create cairo scaled font, expect ugly output. the offending font is 'Source Han Sans JP 12'

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.454: font_face status is: file not found

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.454: scaled_font status is: file not found

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.454: shaping failure, expect ugly output. shape-engine='PangoFcShapeEngine', font='Source Han Sans JP 12', text='いろはにほへと'

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.454: failed to create cairo scaled font, expect ugly output. the offending font is 'DejaVu Sans 12'

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.454: font_face status is: file not found

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Pango-WARNING **: 11:37:23.455: scaled_font status is: file not found

(/gnu/store/rllrc55ygi4yhxnhq8v41ynl6mg5ak56-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:3436): Gtk-WARNING **: 11:37:24.166: Could not load a pixbuf from /org/gtk/libgtk/theme/Adwaita/assets/check-symbolic.svg.
This may indicate that pixbuf loaders or the mime database could not be found.
JavaScript error: resource://activity-stream/lib/Screenshots.jsm, line 102: TypeError: cache is undefined
JavaScript error: resource://activity-stream/lib/Screenshots.jsm, line 102: TypeError: cache is undefined
JavaScript error: resource://activity-stream/lib/Screenshots.jsm, line 102: TypeError: cache is undefined
JavaScript error: resource://activity-stream/lib/Screenshots.jsm, line 102: TypeError: cache is undefined
JavaScript error: resource://activity-stream/lib/Screenshots.jsm, line 102: TypeError: cache is undefined
console.log: Accessibility service init or shutdown observer does not exist.
*** UTM:SVC TimerManager:registerTimer called after profile-before-change notification. Ignoring timer registration for id: telemetry_modules_ping

I don't know how to correct it.