[paypal] Fix anti-scraping protection against global browser objects;

And also update pages regexp to match the website.
10 jobs for fix-paypal in 0 seconds (queued for 1720 minutes and 25 seconds)
latest
Status Job ID Name Coverage
  Build
failed #6234
build:2.7

failed #6235
build:3

 
  Test
skipped #6237
allowed to fail
lint:2.7
skipped #6240
allowed to fail
lint:3
skipped #6236
pyflakes:2.7
skipped #6239
pyflakes:3
skipped #6238
unittests:2.7
skipped #6241
unittests:3
 
  Deploy
skipped #6242
doc:2.7
skipped #6243
doc:3
 
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failed
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failed
build:3 Build There is an unknown failure, please try again
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