Vichrome’s default key bindings are:

j : scroll down  
k : scroll up  
h : scroll left  
l : scroll right  
<C-e> : scroll down  
<C-y> : scroll up  
t : open new tab  
x : close tab  
X : Close the current tab and focus the previous tab  
r : reload tab  
/ : enter search mode  
? : enter backward search mode  
a : enter link text search mode(search only text that have a link and focus it)  
n : next search result  
N : previous search result  
gg : go to top of the page  
G : go to bottom of the page  
gt, <C-h> : move to left tab  
gT, <C-l> : move to right tab  
H : back history  
L : forward history  
u : restore last closed tab  
gp : pop out current tab to new window  
gs : open source of the current page in a new tab  
f : enter f Mode (like HIT-A-HINT)  
F : enter f Mode (open links with new tab)  
i : focus on first input area  
o : Open new page with awesome completion  
O : Open new page in new tab with awesome completion  
s : Google Search  
S : Google Search in new tab  
b : Open bookmark  
B : Open bookmark in new tab  
<C-f> : page down  
<C-b> : page up  
<C-d> : page half down  
<C-u> : page half up  
: : enter Command Mode  
” : back to last auto page mark  
yy : copy URL to clipboard  
p : Open a URL based on the current clipboard contents in the current tab  
P : Open a URL based on the current clipboard contents in a new tab  
<C-^> : switch tab focus to the previously focused tab  
,z : toggle image size  
<ESC> : cancel all input/command and blur focused element