User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.1.2 Safari/605.1.15
Steps to reproduce:
I have about 60-70 urls saved in my homepage url string.
in Nightly (Main doesnt appear to do this) I open up homepage and place cursor in url path and scroll right (or hold down to do a select and scroll right as thats faster to scroll across).
even stepping through each character can manually produces the background change. it seems to be about 26-30 chars the tab colour is fine, and then goes white for 4 chars.
The flashing has a repetitive rhythm to it, so it isnt just a single url for example causing the background tab colour to change to white etc.
Even clicking into the homepage url can make tabs go white. I tried screenshotting and the white tab eventually turned black so maybe its just GPU needing to catch up on the render or something.
The tabs at the top background colour transitions between black and white, causing a flashing effect.. Screenshot of white tab attached.
when stepping through it looks like it is about every 26th or so character, then white for about 4 characters but have had it remain white for say 7-9 characters..
It did feel like sometimes it was triggering like 4 chars before an every second | or http: etc and sometimes 4 chars before a random /, almost like it was reading ahead of what could be visually seen in the homepage url box.
tab colour/fonts don't change colours.